Is there enough creature removal in there?

Yes it's legal, check Modern

I dont know alot of modern but I dont think Shriekgeist is gonna do alot since its an 1/1 and will die by spirits

Also Increasing Confusion is an awesome mill card. And are Glimpse the Unthinkable and Mind Funeral modern legal? If so run 4 of each .

i like milling my oponents, i like jace as a character .... and there are a lot of jace themed milling cards....and TADAAAAA....idea was born...anyways...this deck kinda plays like a continues flow of milling until the opponent has nothing left works pretty well in the tests i put it through