Muktol

Ups, didn't see that you already had "Hedron Crab" and therefore are already within modern.

So, here are some suggestions:
Glimpse the Unthinkable ({B}{U}, mill10), Mesmeric Orb (If you don't play many creatures), Mind Funeral ({1}{U}{B}, mill cards until your opponent reveals 4 lands), Tome Scour ({U}, mill 5 cards), Jace, Memory Adept, Visions of Beyond (Carddraw), Extirpate (Remove all copies of a already milled card), Memory Sluice ({U/B} mill 4), Windfall (Carddaw), Millstone ({2}, pay {2} mill 2), Twincast (Copy target spell), Mirari (Copy target spell)

Greetings
Muktol

Just for information, if you want to keep this standard:
M13 and the Innistrad block (Innistrad, Dark Ascension and Avacyn Restored) got rotated out of standard with the publication of Theros

I would try to cut back some of the 1-offs to raise the number of cards you want to draw and you need to draw. Furthermore you could move some creatures that you don't need every match, e.g. "Serra Angel", into your sideboard.
"Grove of the Guardian" could be an idea, as it gives you another token you can populate.

Some suggestions from a quick search:
Armada Wurm (5/5 Wurn+ 5/5 Token), Elspeth, Sun's Champion (3x 1/1 token per turn), Growing Ranks (At your upkeep populate), Murder Investigation, Precinct Captain, Trostani, Selesnya's Voice, Voice of Resurgence
Sideboard: Beckon Apparition (Exile target creature from a graveyard, 1/1 token)

Greetings
Muktol

Read the description of "http://www.mtgvault.com/muktol/decks/how-to-build-a-deck/", there are some tipps how to generaly built a deck.

A mill deck normally uses few creatures but utilizes many spells to mill and control your opponent.

As for the legality, look at the cards you're using, e.g. "Cao Cao, Lord of Wei". Open the card details and on the right side there is a list, where this card can be used.

Greetings
Muktol

Do you want to stay within the 'old' standard legality or use some of the modern-spells?

I would nevertheless do some things here:
Change from "Font of Mythos" to "Howling Mine". It comes earlier, and with some help, e.g. from "Clock of Omen" or "Icy Manipulator", only you benefit from it.
I would also try to raise the number of "Etched Champion" up to 4, it's one of your best beaters, and "Master of Etherium" also up to 4, at last he is a lord and pushes all your artifact creatures.
If you feel that you're having to much mana, I would also remove either "Palladium Myr" or "Vedalken Engineer"
"Master Transmuter" is nice, but in my oppinion, to benefit from it, you need something big, like e.g. "Akroma's Memorial", "Colossus of Akros", "Darksteel Forge", "Elbrus, the Binding Blade", "Blightsteel Colossus", and so on

If you want to work with other cards than Kor, you can take either humans or Cats:
"Auriok Glaivemaster" (Cuman), "Auriok Steelshaper" (Human)
"Leonin Den-Guard" (Cat), "Raksha Golden Cub" (Cat), "Skyhunter Cub" (Cat), "Sunspear Shikari" (Cat)

When working with humans "Avacyn's Collar", "Bladed Bracers" , "Sharpened Pitchfork" and "Silver-Inlaid Dagger" are cheap but good equipments to boost their strength.

Some suggestions, based on my standard U/B mill/discard deck (http://www.mtgvault.com/muktol/decks/bu-standard-discard/)
Consuming Aberration ({3}{U}{B}, Power and toughness based on number of cards in your opponents' graveyards, whenever you cast a spell your opponent is milled until he reveals a land), Drainpipe Vermin ({B}, 1/1, if it dies, pay {B} and your opponent discards a card)
Liliana's Reaver ({2}B}{B}, 4/3, deathtouch, whenever he deals combat damage, you get a 2/2 token and your opponent discards a card)
Wight of Precinct Six (Power and toughness based on number of creatures in your opponents' graveyards), Nighthowler (Power and toughness based on number of creatures in all graveyards)
Disperse ({1}{U}, return target nonland permanent to it's owners hand), Hero's Downfall ({1}{B}{B}, Pointremoval), Psychic Strike ({1}{U}{B}, counter and mill), Mind Rot ({2}{B} your opponent discards 2 cards), Pilfered Plans ({1}{U}{B}, draw and mill)

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

Some suggestions, based on my monoG elf warrior deck (http://www.mtgvault.com/muktol/decks/monog-tribal-elf-warriors/)
Imperious Perfect ({1}{G}, 2/2, +1/+1 for all elves, can produce 1/1 elf warrior tokens), Joraga Warcaller ({G}, 1/1, pushes him and all elves, based on the mana you kicked into him), Talara's Battalion ({1}{G}, 4/3, trample), Wren's Run Vanquisher ({1}{G}, 3/3, deathtouch)
Obsidian Battle-Axe ({3}, +2/+1, haste, equipes automaticly to new warriors entering the battlefield)
Oran-Rief, the Vastwood (+1/+1 counter for each green creature that entered the battlefield this turn)

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

Neither is "Mirri's Guile", depends on what legality you want to use

Another possibility would be "Skullclamp", though it is banned in Legacy, "Glimpse of Nature" or "Lead the Stampede".

I don't know much about pauper, especially if there is a bannlist, or if it keeps with the modern bannlists (Ponder & Preordain)
I would add "Dimir Aqueduct" as second dualland to get your manabase more stable.

Here are some cards that I found with a quick search and I would use myself in a milldeck
Balustrade Spy ({3}{B}, enters the battlefield (ETB) opponen reveals cards from library until reveals a land, puts those into his graveyard), Merfolk Mesmerist ({1}{U}, 1/2, {U} tap, mill 2), Shriekgeist ({1}{U}, 1/1 flying, Whenever Shriekgeist deals combat damage to a player, mill 2),
Curse of the Bloody Tome (Alternative to "Jace's Erasure", faster, if you don't manage to regulary draw additional cards), Dampen Thought ({1}{U}, mill 4), Dream Twist ({U}, mill 3, flashback {1}{U}), Grisly Spectacle (alternative to "Devour Flesh", costs more but mills some cards), Horrifying Revelation ({B}, Discard 1 and mill 1, gives yo a little more control over your opponent)
Induce Paranoia (Alternative to Psychic Strike), Memory Sluice ({U/B}, mill 4), Pilfered Plans (draw 2, mill 2)

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

I would change some things here:
Remove "Barony Vampire". Simply because there are better vampires.
Remove "Blood Bairn" and "Bloodthrone Vampire". You don't have anything that produces enought dispensable creatures.
Remove "Chancellor of the Dross". In a multiplayer-game it could be usefull, but the lifegain is irrelevant in 1 on 1 and by the time you could cast him, you allready should have won the match.
"Falkenrath Exterminator" and "Markov Blademaster". With intimitade they could be usefull, but I would concentrate on the Blademaster.
Remove "Screeching Bat". 7 mana for a 5/5 flying without further abilitys is too much.
Remove "Mark of the Vampire", see suggestions under "Madcap Skills".
Change from "Doom Blade" and "Victim of Night" to something that hits more, see suggestions under "Termnate" and "Dreadbore".
Try to raise the number of "Stromkirk Captain" to 4

Some sugestions based on my own 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, haste when an opponent hast 10 or less life), Bloodline Keeper ({2}{b}{b}, tap produces a 2/2 flying vampire token, if you control 5+ vampires pay {b}, flip him and all your vampires get +2/+2), Stromkirk Noble ({r}, 1/1, can't be blocked by humans), Vampire Nighthawk ({1}{b}{b},2/3 flying, lifelink, deathouch), Bloodlord of Vaasgoth ({3}{b}{b}, bloodlust 3, vampirespells you play have bloodlust 3)
Go for the Throat (Spotremoval), Lightning Bolt (Spotremoval), Terminate (Spotremoval), Dreadbore (Spotremoval), Sign in Blood (Carddraw), Read the Bones (Carddraw), Gruesome Deformity (Enchant, Intimidate), Madcap Skills (Enchant, +3/+0, creature can't be blocked by 2 or more creatures)
Blackcleave Cliffs (Dualland), Dragonskull Summit (Dualland), Graven Cairns (Dualland)

I hope this wasn't to much and I was able to help you a little bit
Greetings
Muktol

Some suggestions based on my monoW human deck (http://www.mtgvault.com/muktol/decks/monow-tribal-human-wheeny/)

Thalia, Guardian of Thraben ({1}{w}, 2/1, first strike, all costs of non-creature spells are increased by {1})
Bonds of Faith ({1}{w}, +2/+2 if human, if non human creature can't attack or block), Call to Serve ({1}{w}, +1/+2 and flying), Battlewise Valor ({1}{w}, +2/+2, scry 1), Spirit Flare (Flashback-spell)

Greetings
Muktol

I would slightly change the equipment you use, to some cheaper, but more effective, one. See under 'suggestions'

Move "Kor Sanctifiers" into your sideboard, as you don't have matches where you need to destroy artifacts/enchantments all the time.
Lower the number of "Conqueror's Pledge" to 2 (or even 1). This is a finisher, and you don't need to draw it early.
Lower the number of "Emeria, the Sky Ruin" to 3 as this land comes into play tapped (which can ruin your day with a fast deck) and you only need it late on (As you need 7 plains in play to activate its effect which will happen rather late)

Suggestions, based on my own mono-W kor equipment deck (http://www.mtgvault.com/muktol/decks/monow-kor-equipment/)
Bone Saw ({0}, {1} to equip, 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)
Kor Skyfisher ({1}{w}, 2/3 flying, with the drawback that you have to take a card back to your hand), Ornithopter ({0}, 0/2 flying, increases your artifact-count and serves as flying carrier for e.g. "Cranial Plating"), Puresteel Paladin ({w}{w}, 2/2, with metalcraft equip costs are reduced to 0), Darksteel Citadel (Artifact land, increases the artifact counter)

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

I would remove "Inexorable Tide" as you want to be fast with an infect deck, and this costs to much to play. Alternative could be "Thrummingbird"
Change from "Distortion Strike" to "Artful Dodge". Costs the same mana but you have the chance to cast it again if needed.

Some suggestions based on my own mono-G infect deck (http://www.mtgvault.com/muktol/decks/monog-infect/)
Bonesplitter ({1} to play, {1} to equip, creature gets +2/+0)
Corpse Cur (If the match takes longer and you need a creature from your graveyard), Ichorclaw Myr (+2/+2 if blocked), Rot Wolf (Carddraw), Spinebiter (Finisher)
Evolution Charm (Very flexible card), Groundswell ({g}, +2/+2, with landfall +4/+4), Mutagenic Growth (2 life or {g}, creature gets +2/+2), Vines of Vastwood ({g}, creature gets hexproof, kicker {g} creature gets +4/+4)

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

If you want to stay within the modern-legality, you will have to remove "Seat of the Synod"

I would remove some of the 1-offs and try to raise the number of the rest of your cards, so that your chance to draw them is increased.

"Summer Bloom", "Explore" or "Oracle of Mul Daya" (With the 'drawback' of having to play with your library revealed)
"Vines of Vastwood" as protection, if you get the mana fast enough maybe "Akroma's Memorial"
"Joraga Warcaller" can eat LOTS of mana, but both the Hydra and Omnath are good 1-offs. "Helix Pinnacle" *g*, "Polukranos, World Eater"
I would cut 1-2 of the 3 mana-elves, and use some more carddraw, e.g. "Elvish Mystic" as you will be in topdeck modus very fast.

Greetings
Muktol

You will have to remove "Gaea's Touch" to stay within the modern legality.
Also I think that you're playing to many ramp-elves where you could use some damage or protection.

Greetings
Muktol