Muktol

Some changes I would do:
Remove "Markov Blademaster" as he is to slow or needs massive support (removal, enchantments, equipment) to get to your opponent.
Lower the number of "Bloodline Keeper" to 3, as he costs rather much (cc4)
Raise the number of "Vampire Nighthawk" to 4
Lower the number of "Dreadbore" to 2 and raise "Terminate" to 4. You shouldn't encounter that many planeswalkes, and if, use 2 more "Dreadbore" in your sideboard.
A alternative to "Gruesome Deformity" could be "Shadow Alley Denizen" as you play enough black creatures. If played, use it 3-4 times.

Some suggestions, based on my B/R vampire deck (http://www.mtgvault.com/muktol/decks/br-tribal-vampire/)
Stromkirk Noble ({R}; 1/1; can't be blocked by humans; when he deasl player damage, he gets a +1/+1 counter), Curse of Stalked Prey ({1}{R}; enchantment/ curse; whenever a creature deals combat damage to enchanted player, it gets a +1/+1 counter), Go for the Throat ({1}{B}, destroy target non-artifact creature), Sign in Blood ({B}{B}, pay 2 life: draw 2 cards), Read the Bones ({2}{B}, pay 2 life; scry 2 then draw 2 cards)
Blackcleave Cliffs (dualland), Dragonskull Summit (dualland), Graven Cairns (dualland)

I hope I was able to help and give you some ideas
Greetings
Muktol

You don't have anything to use the masses of mana pdoruced with "Caged Sun". To get the +1/+1 effect there are cheaper ways, like "Bad Moon" or another "Captivating Vampire"
Furthermore I would remove "Mindcrank" as it's harder to mill 60 cards (60 (or 30 with two of them) damage in your case) than to beat your opponent to zero life (20+ damage)
I would change from "Underworld Connections" to "Read the Bones" as it gives you the chance to dig up to 4 cards deep into your library. Yes it's not reusable, but it might give you what you need, now.
"Bojuka Bog" belongs into a sideboard, against graveyard-decks. You could add some searchlands like "Evolving Wilds" or "Marsh Flats"

Some suggestions. based on my B/R vampire deck (http://www.mtgvault.com/muktol/decks/br-tribal-vampire/)
Bloodghast ({B}{B}; 2/1; can't block; comes again from the graveyard with landfall), Guul Draz Assassin ({B}; 1/1; level up {1}{B}, level 2-3: pay {B}, tap, target creature gets -2/-2)
Sign in Blood ({B}{B}, pay 2 life; draw 2 cards), Read the Bones ({2}{B}, pay 2 life; scry 2 then draw 2 cards), Blade of the Bloodchief ({1}, {1} to equip, equipped vampire gets 2 +1/+1 counters if a creature died)

I hope I was able to give you some ideas
Greetings
Muktol

Looking better now.

I would additionaly do the following changes:
+2 Bloodghast
-2 Guul Draz Vampire
-4 Pulse Tracker
+2 Vampire Lacerator
+2 Vampire Nighthawk

If enough creatures (your or your opponents) go into the graveyard, you could thing of "Tragic Slip" as replacement for "Grasp of Darkness", which also would lower your mana-curve a little bit.

Deceide either for "Bloodlord of Vaasgoth", "Kalitas, Bloodchief of Ghet" or "Nirkana Revenant", and remove the others.
Then I would do some testgames and see which creatures work, and which don't. Try to increase the quantity of the rest, to draw cards you want to have more constant.

Neither is suited for pauper.

The Problem I see is, that you will have to protect yourself.
Elfs are all fine, but I think you would do better using defenders here.

Why the hell do all black decks use "Dark Ritual" at the moment...(Not meant to offend you, I simply don't understand it)

Some things I would change here:
Remove "Pulse Tracker". There are better cc1 vampires (in red)
Remove "Doom Blade". There are better removals
Remove "Chandra Nalaar". Belongs into a burn deck, and even there she is way to expensive for what she can do.
Remove "Blood Tribute". To expensive, when you are able to play it, wou should allready have reduced your opponent's lifepoints to a great deal.
Remove "Rakdos Guildgate". Comes into play tapped and thus slows you down.

Sideboard "Blood Seeker". He is very good against e.g. token decks, but against a deck which play only a few, strong, creatures, he is less usefull.

Questionable
"Gatekeeper of Malakir". The tripple black costs are hard in a B/R deck

Add:
+1-2 Rakish Heir
+1 Stromkirk Captain
+1-2 Vampire Nocturnus
+1 Geth's Verdict
+2 Read the Bones

Some suggestions, based on my B/R Vampire deck (http://www.mtgvault.com/muktol/decks/br-tribal-vampire/)
Bloodghast ({B}{B}; 2/1; can't block; comes again from grave with landfall), Stromkirk Noble ({R}; 1/1; gets a +1/+1 counter every time he hits your opponent)
Curse of Stalked Prey {1}{R}, alternative to "Rakish Heir"), Lightning Bolt ({R}, deals 3 damage to player or creature), Terminate ({B}{R}, destroy target creature, it cant be regenerated)
Blackcleave Cliffs (dualland), Dragonskull Summit (dualland), Graven Cairns (dualland)

I hope I was abke to help and give you some ideas
Greetings
Muktol

Some suggestions, based on my monoR goblin deck (http://www.mtgvault.com/muktol/decks/monor-tribal-goblins/) and my monoW equipment deck (http://www.mtgvault.com/muktol/decks/monow-kor-equipment/)
Remove 2-3 "Panic Spellbomb" for additional "Infiltration Lens"
Remove "Accorder's Shield" for e.g. "Bone Saw" as it would be more aggresive
Change from "Darksteel Axe" to "Bonesplitter" as it is cheaper to play
Change from "Memnite" to "Cranial Plating"
Lower the (total) number of lands to 20, or even maybe 18 (test it out) and add 1-3 "Teetering Peaks" instead of normal mountains.
I would give e.g. "Dragon Fodder" a test as you only have 1 goblin to buff your creatures and thus one token more or less doesn't really make a difference. Yes, it's more expensive to play, but you don't loose the euipment you want to buff your creatures with.

With so many equipment you could also take a look at "Goblin Gaveleer" and/ or "Warren Instigator"
A good way to speed up your game could be "Æther Vial"

I hope I was able to give you some ideas
Greetings
Muktol

I would use some less 1-offs and try to increase the number of some other cards instead.

I would use some more creatures (2-4) and some cheaper equipment.

Some suggestions, based on my monoW kor equipment deck (http://www.mtgvault.com/muktol/decks/monow-kor-equipment/) and my monoW pauper equipment deck (http://www.mtgvault.com/muktol/decks/monow-pauper-equipment-2/)
Auriok Glaivemaster ({W}; 1/1; when equipped: +1/+1 and first strike), Auriok Sunchaser ({1}{W}; 1/1; metallcraft: gets +2/+2 and flying with 3+ artifacts on the field), Skyhunter Cub ({2}{W}; 2/2; gets +1/+1 and flying when equipped), Sunspear Shikari ({1}{W}; 2/2; gets lifelink and first strike when equipped)
Basilisk Collar ({1}, {2} to equip, creature gets lifelink and deathtouch), Bone Saw ({0}; equip {1}; creature gets +1/+0), Bonesplitter ({1}; {1} to equip, creature gets 2/+0), Cranial Plating ({2}; {1} to equip; creature gets +X/+0 where X is the number of artifacts you control), Swiftfoot Boots ({2}; {1} to equip, creature gets hexproof and haste), Sylvok Lifestaff ({1}; {1} to equip; creature gets +1/+0, you get 3 life when equipped creature dies), Leonin Scimitar ({1}; {1} to equip; creature gets +1/+1)
Dispatch ({W}; tap target creature; metalcraft (+3 artifacs under your control), exile target creature)

I hope I was able to give you some ideas
Greetings
Muktol

I used it earlier but removed it later on, to have more slots for point removal.

I would remove "Clutch of the Undercity" as there are better bounce spells. If it's for the transmute effect I would use "Muddle the Mixture"

Some suggestions, based on my U/B discard-control deck (http://www.mtgvault.com/muktol/decks/bu-control-discard/)
The Rack ({1}; in your opponents upkeep, The Rack deals X damage to him, where X is 3 minus the number of cards in his hand), Megrim ({2}{B}, Whenever opponent discards a card, Megrim deals 2 damage to that player), Scepter of Fugue ({B}{B}; {1}{B}, tap, target player discards a card)
Careful Consideration ({2}{B}{B}, target player draws four cards, then discards three cards), Wistful Thinking ({2}{B}, target player draws two cards, then discards four cards), Smallpox ({B}{B}, Each player loses 1 life, discards a card, sacrifices a creature, then sacrifices a land)
Drowned Catacomb (dualland), Sunken Ruins (dualland)

I hope I was able to give you some ideas
Greetings
Muktol

Basically your deck lacks removal, to help get your vampires through your opponents defenses.

A alternative to "Deviant Glee" could be "Madcap Skills" as this gives your creature +3/+0 and it can't be blocked by 2 or more creatures.
A alternative to "Uncanny Speed" could be "Vampiric Fury" where ALL your vampires get +2/+0 and first strike.

Some things I would remove and change here:
"Knight of Infamy", into the sideboard, as you don't encounter a white deck every match.

Remove "Falkenrath Marauders", as they are way to expensive for what they do.
Remove "Rakdos Shred-Freak", humans are only needed in a sacrifice deck ;).
Remove "Thrill-Kill Assassin", good card, but e.g. "Vampire Nighthawk" costs only 1 more, has evasion and can block.
Remove "Vivid Marsh", see duallands under suggestions.

+ 1-2 "Guul Draz Assassin", you always want one of those on the battlefield, as they are a good removal.
+2 "Rakish Heir", alternative could be "Curse of the stalked Prey", see suggestions
+2 "Stromkirk Captain" too god, not to be used 4 times.
+2 "Vampire Nighthawk" too god, not to be used 4 times.

Some suggestions, based on my B/R vampire deck (http://www.mtgvault.com/muktol/decks/br-tribal-vampire/)
Bloodghast ({B}{B}; 2/1; can't block; comes again from graveyard with landfall), Vampire Nocturnus ({1}{B}{B}{B}; 3/3; play with top card of library revealed, as long as it is black, your Vampires get +2/+1 and have flying), Bloodlord of Vaasgoth
Curse of Stalked Prey ({1}{R}; whenever one of your creatures deals damage to enchanted player, it gets a +1/+1 counter), Go for the Throat ({1}{B}, destroy target creature), Lightning Bolt ({R}, 3 damage to target creature or player), Terminate ({R}{B}, destroy target creature, cant be regenerated), Dreadbore ({B}{R}, destroy target creature or planeswalker), Sign in Blood ({B}{B}, pay 2 life, draw 2 cards), Read the Bones ({2}{B}, pay 2 life; scry 2, then draw 2 cards)
Blackcleave Cliffs (dualland), Dragonskull Summit (dualland), Graven Cairns (dualland)

I hope I was able to give you some ideas
Greetings
Muktol

Yep, but only due to "Dark Ritual".
And I keep my fingers from Vintage/ Legacy decks, as I have absolute no expirience there.

I will test Glistener Elf and Skarrgan Pit-Skulk with a 2/2 split. The Elf has the advantage of being more aggressive in the beginning, the human does a good job when drawn later on.
I thought of some additional spells, like removal, but I don't know which card I should remove here. Have to do some testgames first.

"Clearwater Goblet", as Chronozoa is cheaper to play, and also a creature which helps to protect you.

I use a little different approach in my http://www.mtgvault.com/muktol/decks/wg-tribal-angel/ to get the angels on the field fast enough. "Axebane Guardian", "Overgrown Battlement" and 2 more defenders help me to stay alive and get mana fast. If all runs right, I can play "Avacyn, Angel of Hope" (cc8) or any other angel I play within turn 4.
"Harmonize" helps me to draw cards and "Cloudshift" is used to protect the creatures I use.

You could use Chronozoan as living counter-"safe" and defender against creatures. But to achive this, you should add some more "Power Conduit"
A deck which specializes on counter transfer, I built for a friend might give you some other ideas (http://www.mtgvault.com/muktol/decks/monou-counter-transfer/)

The question is, when it is supposed to be a fundeck, do you want any advice on making it better or do you want to leave it like it is?

I modified a deck for a friend, that played with "Chronozoa" and "Titan Forge".
Some suggestions, based on this deck (http://www.mtgvault.com/muktol/decks/monou-counter-transfer/)

Chalice of the Void ({X}{X}, comes itno play with X counters, counter any spell with converted manacosts "X"), Contagion Engine ({6}, when it enters the battlefield, put a -1/-1 counter on any enemy creature; tap pay {4} proliferate x2), Surge Node ({1}, comes into play with 6 counters, tap an pay 1, move a counter from Surge Node to target artifact)

Arcbound Worker ({1}, 1/1, modular 1), Chronozoa ({3}{U}; 3/3; flying; vanishing 3; when it vanishes put two copies of it onto the battlefield), Etherium Sculptor ({1}{U}; 1/2; artifact spells you play costr {1} less to cast), Thrummingbird ({1}{U}; 1/1; flying; when it deasl combat damage, proliferate), Wing Splicer ({3}{U}; 1/1; comes with a 3/3 golem; golems you control have flying)
Thoughtcast ({4}{U}; affinity for artifacts; draw two cards)

Urza's Mine, Urza's Power Plant, Urza's Tower

I hope I was able to give you some ideas
Greetings
Muktol