vaan104

1st thing you need to get this deck to 60 cards and soul warden is better then soulmender you shouldn't need more then 24 land I usually only use 21-22 land

you need to work on you lands evolving wilds, terramorphic expanse, thawing glaciers, any kind of dual lands
you also need land ramp cards like harrow
chromatic lantern is the best mana fixing card
darksteel ingot would be good to
then you need something for protecting your commander like lightning greaves or swiftfoot boots

id add the m15 nissa and the land nykthos, shrine to nyx

balefire dragon would be a good add

you have a few cards that are not legal in this deck you cant have the u/w mana cost guys in here and arcanis is probably a better commander id add cyclonic rift and chasm sculker

I would love to see emrak cheaper I own 2 but would buy more if the price drops im currently running my 2 in a reanimate deck with 4 goryo's turn 1 emrak is just great I love it lol

that will be really tough to do in standard with any consistency I just recently finished putting together an edh deck that does what you want not to many standard cards in it tho
http://www.mtgvault.com/vaan104/decks/give-us-a-hug/

then mimic vat might be good

ya any deck that cheats giants into play is always great fun

with that many planeswalkers u need doubling season in here and more land

add sorin and you should mainboard raiders' spoils

I was going to suggest master of cruelties he is great

batterskull would be a great add

you need more polukranos and hydra broodmaster would be good

you need more big spells army of the damned is a good 1

w/o hexproof your creatures die to easily and you lose the enchants to if not hexproof id atleast use more enchantment creatures

no I played mine in a 3 player game once. I won it with 52 life lol rush of battle is nice

you should have 4 pack rats swarmyard would be a good land

most of your cards don't really work for mill
traumatize is a good 1 and jace, memory adept
this is a dimir mill edh I made it might give you some card ideas
http://www.mtgvault.com/vaan104/decks/mirko-vosk-edh/

np I still havnt built mine yet but im planning to soon