User blog comment:Kungfugi/Rosy, the Innocent Exterminator/@comment-1445357-20120130042546

I think you need to flatten the mana cost per second for Skulk. Higher AD for one autoattack is not a very good tradeoff for up to 12 Mana per second.

I also feel that passive doesn't seem very reliable to do anything since there's a fair chance only minions are going to be feared whenever you crit.