while i typically would recommend /Kin (you'll always be contributing), I'd actually suggest fire/dark or ice/dark for a new Corruptor.
/Dark brings a tool kit of control, heal & debuff with Tar Patch, Fearsome Stare, Twilight Grasp & Howling Twilight (debuff)
If you really wanna stick with Ice/Storm here is a Corruptor blank with some options that can be adjusted as you fill in the primary and secondary