played both on both pwi and here, .. although my wiz has always been sage..
but yea.. as everyone has said,
depends on ur play style..
both fun to play in their own way. personally, wiz is still more fun for TW for me, and maybe in 1v1's aswell.. but i prefer psy for mass pk, more fun on that for mass pk and 1v1s aswell i suppose. ... ofc. it'll be different for different people.
soooo upto you really
play a little of both and see what suits u best to decide