Stuffman

First thing you can do is just take out the red. It's a waste. Add some draw power, divination or power based draw cards. Add gyre sages and master biomancers. The idea of the deck is to massively increase the power of your creatures so that they can't be beaten. Maybe add rangers path or farseek for mana ramp.

hmm. good. maybe put in creatures like centaur healer which you can also copy for stabilization.

wow. Might want to mainboard your gates :)

Bob what are you talking about

perhaps a trample creature or wolfir silverheart

I would consider running something without double strike, but a great ability (like stromkirk noble (also a 1 drop)) to take advantage of silverblade paladin

take out 2 rewinds and 2 think twice. Perhsaps consider increasing the number of Jaces and Gideons. I would also recomend using Jace, Architecht of Thought instead of Jace, Memory Adept

Needs Sphinx's revelation for stabilization.

This is my idea for mill
http://www.mtgvault.com/stuffman/decks/dimir-speed-mill/
It's not been used before and it does work.

Divination maybe, inspiration for instant speed. Or cards like ammass the components (or something like that)

The main problem with this deck that i find is draw power. With Liliana's +1 you are making yourself discard cards as well. Therefore you will need the draw power to help yourself from suffering as a result of this.

The mutilatess are a good idea. But as he only has 20 land in the deck, adding more consuming abberations would not be a good idea.

I would recommend that if you are going for mill that you mainboard the mind sculpts. Increase the number of Jaces and Lazavs. Take out the crypt ghasts and artful dodges.

Fiend Hunters! Create the infinite loop!

clifftop retreats?

The problem with this deck is that your playing to much control and stall. Have you considered splashing green for mana ramp like ranger's path and farseek so that you can use cards like mind grind more effectively. For a mill deck you should always have at least 3 mind sculpts and you could also use cards like increasing devotion (which has a good flashback cost) Snapcaster mage is a good idea but you don't have many good spells to cast using his ability.
I would take out the dispels, murder and the negate for 4 mind sculpts. Then for 4 mana you can play snapcaster mage and play those spells again.

15 swamps. Are you an idiot?

This is a really good deck for the $34 cost. I like it.

Instead of having smite the monstrous you should have intrepid hero's, they great and you can use them a lot.

Another thing you could do would be to put in an Akroma's Memorial or 2 just for the fuck you factor

more thragtusks and less land. use cars like seek the horizon and boundless realms to help with the mana ramping.