I was brainstorming for a bit about how champions would play on Dominion, and think I found a duo that may be slightly OP.
Alistar+Kayle. If Alistar ults, he's nearly invincible for 5 seconds. So say he ults, then begins capturing a tower...free 5 seconds or so of capturing. Now Kayle ults him, 5 more free seconds of capturing (thats a possible free tower, or half capture of a tower). Now Kayle can heal Ali, and once the tower is captured Ali can heal himself.
Also, unrelated to this thread I have two questions about Dominion if any Reds see this:
Can we queue with any amount of players like normals or will it be solo/duo/5man (my guess is any amount but just wondering.)
Also, is capturing roughly 20 seconds, with 2 seconds taken off per champion capturing? (down to a 10 second capture with all 5)