Would lethality be good on....

Anyone. Lethality is in a nasty nasty place right now. I've been seeing my team get shitstomped by Akali with duskblade youmuus. If that doesn't say how dumb it is idk what will.

Kindred is not viable.

If you plan on finishing the game early, sure go leathlity.

But right now her most optimal build is Crit... even though only one of her abilities actually benefits from it. Thank you Riot for your 'brilliant' balancing team.

However, mixing Lethality into your crit build can be pretty damned devastating. Just don't grab dusk blade. You won't be able to use it efficiently.