Kai'sa Duskblade

A question here, want to go lethality jung on the champ because why not, anyway she has invis on E if upgraded, but its like what 0.5 secs? Thus not enough to get the 1 sec proc on unseen by duskblade...this pretty much sucks, considering vayne has the invis at 1 sec for ex and so can proc it...

I thought Rito wanted a champ with various buildpaths, this makes lethality path far less effective on her if not eliminating it entirely in favor of other buildpaths like AS, crit AD etc.

Offering no solutions, leave that to you, just saying