So, I've been (and will continue) playing a lot of 'all random' games for the sheer JOY and diversity (hence the joy) that it brings. For me, it's the closest thing that I can do to play a variable game that is mostly unexpected and new short of: a complete favor balance, or super nerf of BoF (while those two may actually be the same thing).
Oh yeah, the OP. So the all random game turned out to be all assasin: my team [da, beast, rook(me)] vs. rook, rook, tb. At first I was thinking "props to those guys for not conceding." But after we won I kept wondering, could double rook be super-awesome-fantastico?!!!? Yes, I know, it depends on the opposing team demi and other team demi, but in a situation where all hope isn't lost, could the double rook dominate? We were 3v3 cata btw, and it was a fun game regardless.
Also, would you go two towers- one tower one hybrid- two slams? Which combination would be the most deadly? A giant tower farm in one lane or double slam in your face And please don't say "it is unlikely so why even discuss"-- diversity for this game is the only thing that makes it fun anymore, so I'm becoming more open to doubles and triples in games if it makes it more fun.