Shuriken Toss damage is redicilous. Crits for 20k, and a rogue can just kite you.
As a mage, in a bad situation, if you pop (example) Ring of Frost, the rogue doesn't have to run in at all. He can stay outside and throw as many Shuriken as he wants, and crit 20k every time.
THIS NEEDS A NERF!