I like your mimeo. How is the mill working for you? Thought of adding it to mine, but seemed underwhelming. Check out mine @ Urborg School for Mimes.
I love this deck also, I have a grinder Mimeo with insane card draw. A lot similar to your deck, but fewer creatures. If I may suggest some cards: Mindcrank goes very well with a grinder.Vulturous Zombie also love it's with my deck.AEtherling win con as Mimeo or win con by itself.Mind Grind win con or finding a lot of stuff for Mimeo.
I have a Mimeoplasm deck myself (they are tonnes of fun). Depending on the situation, your going to be wanting to mill yourself rather than your opponent, You could do that though various methods, but my personal favorite is Traumatize . You should also look as Treasured Find and other cards that let you recover stuff from your grave. Its also worth looking into the Transmute, Delve and Dredge mechanics, as they can help you a lot.