Off-tank Yi? Q & A
AD Yi is a splitpusher or he tries to kill AD carries almost instantly. Due to his lack of utility (seriously he has none) he's easily ignored if he doesn't deal much damage.
I think those could be added. The problem is there aren't many AP + Armor items other than Zhonya's.
I guess an alternative could be your basic Warmog's Armor Atma's Impaler Frozen Mallet Infinity Edge Youmuu's Ghostblade and Phantom Dancer or Trinity Force