So what have you guys built on him, preferably a build for both Darkin and Shadow Assassin
I have an idea of what he could use, but not really sure what order to build stuff and obviously still trying to find flexible items for matchups. Also, what do you think about Sheen on Kayn? I feel like it could work pretty well but I'm having trouble fitting it into a normal game's budget
Wildstyle1 voteslethality is great in both versions
crzymdscntst1 votesLethality for SA Juggernaut items (like Black Cleaver) for Darkin.
Sheen should work, but the cooldowns mean that he probably will rely on his Q to proc it, meaning a bit higher than standard for sheen-type items. Basically also a cost issue for upgrading it into Trinity as well.
Captaín Insano1 votesHonestly ive been using these builds, and they work so great. havnt had a negetive game on Kayn since release.
Kayn: 
Rhaast: 
Sujiren1 votesFor rhaast in top lane, I think deaths dance into cleaver is core, then tank or bruiser items, like spirit visage , maw of malmortius, randuins, ga, deadmans, thornmail etc.
