Elise new passive idea

passive in human form is basically non existent and her passive in spider form already scales with ranks in her ult, so i say lets just completely move her passive to her ult so she can have a real one. i was thinking something along the lines of gangplanks passive except instead of her aa's applying a stacking dot/slow it would be her damaging ability's i think this fits pretty well into her spider theme because of the poison and slow effects and it will help her at all stages of the game by adding in a little extra chip dmg and a weak but reliable soft cc for ganking and singleing out people in teamfights what do you guys think?