Master Yi Crit and spell shield build
With Warlords bloodlust. I've been playing this when not playing bruiser Yi, It's really fun. You can absolutely wipe someone out but the 2 spell shields work against getting burst down. Mobi boots dont really have as much a downside when you get movespeed from Warlords.
Fervour is good for early duels so if you concerned with outscaling the enemy jungler/toplaner quickly thats a negative for this. If the enemey have like 3 tanky champs you would be better off with an on hit build, or certainly a build with armour pen. Obviously this is great if you're only concerned with the enemies magic damage. I only just tried Mobi but I will keep using them. I suppose next patch I will have to buy new GA not Banshees, but that will probably be stronger.