The only champ that legitimately uses klepto is GP
And it's likely that he will be the sole reason why it can never be good for any other champion.
And it's likely that he will be the sole reason why it can never be good for any other champion.
Try it on ezreal
tried it Not having press the attack mid-late really hampers your dmg
Try playing ap ezreal with kleptomancy instead.

Good on bard and lux and anyone who likes to cast one spell followed by one auto.
Uh, I can use it on 99% of the support champs I play, and I do, because so far its been really fun to use