What do you play that is off-meta and totally works?
AD Shyvana top, which I call "Fireball Shyvana," because I turn into a literal fireball mid to late game as I dive onto the enemy team and splash thousands of damage between them. :D
My main is Nocturne mid. No one seems to remember how huge his early damage is with the right setup, so I farm passively until level 2 then charge at the enemy, Q E auto auto auto and suddenly they're either blowing their flash or they're dead and screaming "WTF IS THAT DAMAGE" in chat. Cheesier than Kraft macaroni.
AP
AP-Attack Speed
Trinity Force - Crit
AP 
I've only tried 1 time but did really well with it, but that was also because she is my main so I've gotten use to her to try something like that. Probably helped that my support was my friend playing Brand so we had strong burst to make up for it. But since I only played it 1 time I didn't want to add Critnivia to the list lol.
support
with
Strangely enough, it works out for me most of the time.
Just gotta play smart