AD itemization is a bit egregious
Just my personal opinion but I think AD items are out of control lately. They get zileans ulti on a passive? Superfluous lifesteal (so many options, AND YOU CAN DOUBLE UP!!), easy access to penetration (once again, SO MANY OPTIONS!), and crazy passive abilities (i.e duskblade instantly kills pink wards or, well, any ward. built in spellshield, reduced damage taken). Just saying but give ap some love. In my opinion you guys just murdered ap items and left ad items busted.
If I had the choice I would make building a lifesteal item preclude the others. Noone needs to have a deaths dance and a ravenous hydra WITH a god damned guardian angel. Its egregious.
and 
both cause you to become invulnerable and untargetable for a short time, if it is timed correctly your team can easily get to you and save you from who even is trying to kill you. And I am pretty sure that Liandry’s passive is also unique, as in no other AD items have it. Also don’t forget 
which increases your ap by 40%, which would be way too broken on an ad item. I think that Seraph’s Embrace is the only item that gives you a shield based on your mana.