I really disagree with champions that are better statwise when in the game together
I think synergy has its place, and it's cool. But having to balance champions around them being ACTUALLY stronger when in-game together is going to be dumb. Either they will be perfectly overpowered when put together, or quite weak when with other supports. It also makes it so that a ban on one is a default ban on the other, unless he/she is super OP. Just bad design imo, love the champ concepts, but you need to remove the "only when both champions appear" thing. It's not good for game health.