Muktol

I would try to lower the number of different cards but increase the quantity of the rest.
I mean no offense, but read the description of http://www.mtgvault.com/muktol/decks/how-to-build-a-deck/

Greetings
Muktol

I would add something that allows you to tap ratifacts (and maybe even benefit from this) so that your opponent can't draw any advantage from "Genesis Chamber" and "Howling Mine".
Furthermore I would lower the number of "Cho-Manno, Revolutionary" to 3 as he is legendary and nearly indestructible and move "Riders of Gavony" into the sideboard, as you don't encounter a tribal deck every match. The same will be true for "Devout Chaplain" and artifacts.
Why not use "Journey to Nowhere" instead of "Banisher Priest", as it is harder to remove? Yes, you use a human, but the priest has a big 'hit me' sign over his head.
I also would add some duallands to make shure you get red mana when you need it.

Some suggestions, based on my monoW human deck (http://www.mtgvault.com/muktol/decks/monow-tribal-human-wheeny/)
Hero of Bladehold ({2}{W}{W}; 3/4; Battle cry; whenever he attacks, put two 1/1 white Soldier creature tokens onto the battlefield tapped and attacking), Student of Warfare ({W}; 1/1; level up to 3/3 first strike and 4/4 double strike), Sublime Archangel ({2}{W}{W; 4/3; flying; exalted; other creatures you control have exalted), Thalia, Guardian of Thraben ({1}{W; 2/1, first strike; non-creature spells cost {1} more to cast), Thraben Doomsayer ({1}{W}{W; 2/2; tap to get a 1/1 human token), Mentor of the Meek ({2}{W}; 2/2; whenever another creature with power 2 or less enters the battlefield under your control, you may pay {1}. If you do, draw a card), Call to Serve ({1}{W}; enchanted creature has flying an gets +1/+2), Path to Exile ({W}; Remove target creature from the game. Its controller may search his or her library for a basic land card, put that card into play tapped, then shuffle his or her library), Brave the Elements ({W}; white creatures you control gain protection from the color of your choice until EOT), Emeria, the Sky Ruin (At the beginning of your upkeep, if you control seven or more Plains, you may return target creature card from your graveyard to the battlefield)

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

I would use some less different cards but increase the quantity of the rest.
I mean no offense, but take a look at: http://www.mtgvault.com/muktol/decks/how-to-build-a-deck/

Greetings
Muktol

"Staff of Domination" would be the more expensive (€ / $) variant, but would allow you to go infinite with 5 defenders on the field. "Freed from the Real" would give you the same in blue (there are some really good defenders in blue), and with "Axebane Guardian" the mana shouldnt be a problem.

Greetings
Muktol

Maybe this link can help you a little bit with some questions about deckbuilding:
http://www.mtgvault.com/muktol/decks/how-to-build-a-deck/
I tried to help starters with this description, to give them ideas, and to avoid some typical problems.

Greetings
Muktol

Perhaps add "Magewright's Stone" or "Staff of Domination", or splash blue, to increase the mana-production by your 'tap for mana' defeneders.

Greetings
Muktol

This looks almost like a commander deck.
If you want to play this as normal magic deck, you should lower the number of different cards but increase the quantity of the rest.
I mean no offense, but maybe this can help you: http://www.mtgvault.com/muktol/decks/how-to-build-a-deck/

Greetings
Muktol

For pauper (and even peasant) you must only use common card-quality, peasant allows you the usage of 4 uncommon cards ;)

Looking good *like*
24 lands seem a little bit much, try to reduce it to 22 or even 20. Also 4 "Captivating Vampire" are a little bit much, I would try to reduce it by 1 or 2 (you will never have that many vampires out to use it's second effect, and if, it's a 'win more')

Some suggestions for the free slots, based on my B/R vampire deck (http://www.mtgvault.com/muktol/decks/br-tribal-vampire/)
Blade of the Bloodchief
Stromkirk Noble, Vampire Nocturnus
Curse of Stalked Prey, Terminate, Dreadbore, Sign in Blood, Read the Bones, Madcap Skills

Greetings
Muktol

I would remove some white and add some red here, as red features some of the best (and aggressive) werewolf's and humans.

Thanks. Either insert it into "2) Effective cards" or use a own section.

"Bloodflow Connoisseur" and "Falkenrath Torturer" are the main sac outlets, so taking one out would reduce the number of cards I can use to sacrifice something to 4, and thats very few, considering that I need one of those to win the match

I have often enought seen 2 werewolfs deal 30+ damage (with trample) to an opponent, and flyers are rather slow, so I would nevertheless sideboard this card for something stronger. ;)

I would do some changes here:
Sideboard "Daybreak Ranger"
Remove "Gatstaf Shepherd" and "Scorned Villager". For both, there are better werewolf's
Increase "Immerwolf", "Kruin Outlaw", "Mayor of Avabruck", "Reckless Waif" to 4
Sideboard "Ancient Grudge" as you shoudn't need it every match.
Remove "Overrun" for to add an additional "Full Moon's Rise" and "Moonmist"

I would also add some more duallands to give your manabase more stability (see suggestions).

Some suggestions. based on my B/R werewolf deck (http://www.mtgvault.com/muktol/decks/gr-tribal-werewolfs-2/)
Ghor-Clan Rampager ({2}{R}{G; 4/4; trample; bloodrush {R}{G}: Discard Ghor-Clan Rampager: Target attacking creature gets +4/+4 and gains trample until end of turn), Young Wolf ({G}; 1/1; undying)
Lightning Bolt ({R}; deals 3 damage to target creature or player), Searing Blaze ({R}{R}; deals 1 damage to target creature and 1 to his controler, with landfall it deals 3 damage instead of 1), Vines of Vastwood ({G; kicker {G}; target creature gets hexproofe, if kicked, it gets +4/+4)
Copperline Gorge (dualland), Fire-Lit Thicket (dualland), Rootbound Crag (dualland), Stomping Ground(dualland), Mutavault (manland)

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

Looking good. *like*
I would try to switch from "Child of Night" to e.g. "Bloodghast" as it is rather weak.
Furthermore I would try to raise the number of "Doom Blade" and "Go for the Throat" to 3 but lower "Murder" to 2. Both cc2 spells combined hit everything you need, and cc3 is often more than what you want to keep unused in mana.
Also I would try to lower the number of "Bloodline Keeper" by 1 or 2 and raise "Captivating Vampire" or even "Vampire Nocturnus" instead, as he has the same costs as Nocturnus but is not so good. So if you have both on your hand, you will play Nocturnus in 99% of the time.
Maybe remove some removal-spells (18 cards) for some carddraw, e.g. "Read the Bones" or "Sign in Blood"

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

I would cut the black part and do G/R instead. Especially in fast decks you will get problems with mana when playing 3 colors.

Some suggestions, based on my monoG infect deck (http://www.mtgvault.com/muktol/decks/monog-infect/)
Bonesplitter ({1}; {1} to equip, creature gets +2/+0)
Blight Mamba ({1}{G}; 1/1; Infect; {1}{G} to regenerate it), Corpse Cur ({4}; 2/2; infect; when he enters the battlefield, return a creature with infect from your graveyard to play), Glistener Elf ({G}; 1/1; infect), Ichorclaw Myr ({2}; 1/1; infect; if he blocks or becomes blocket, it gets +2/+2), Signal Pest ({1}, 0/1; battlecry; can only be blocked by flying or reach)
Rancor ({G}; creature gets +2/+0, when rancor gets into your graveyard, return it to your hand), Wild Defiance ({2}{G}; Whenever a creature you control becomes the target of an instant or sorcery spell, that creature gets +3/+3 until end of turn), Evolution Charm ({1}{G}; Choose one — Search your library for a basic land card, reveal it, put it into your hand; or return target creature card from your graveyard to your hand; or target creature gains flying until end of turn), Groundswell ({G}; Target creature gets +2/+2 until end of turn. Landfall - If you had a land enter the battlefield under your control this turn, that creature gets +4/+4 until end of turn instead), Mutagenic Growth ({G} or 2 lifes; creature gets +2/+2 until end of turn), Vines of Vastwood ({G}; Kicker {G} Target creature can't be the target of spells or abilities your opponents control this turn. If Vines of Vastwood was kicked, that creature gets +4/+4 until end of turn)

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

Looks more like a commander deck ;)
I mean no offense, but tae a look at http://www.mtgvault.com/muktol/decks/how-to-build-a-deck/ . There are some basic deckbuilding strategys described.

Greetings
Muktol

I also startet with B/R in my discard-control deck (http://www.mtgvault.com/muktol/decks/bu-control-discard/) but moved from R to U, as this features some very good draw/ discard spells.
Perhaps you can take some ideas from there.

Greetings
Muktol

Blood Artist would be a good idea, but wat to take out for him? Bloodline Keeper?

Added some lines to "2) Play efficient cards" paragraph and added "midgame" to the "1) Strategy"