This is a trick question, i have won 100 dominions this month 75% with tanky/bruiser Champs and 25% with ADC or AP carrys. why 25% for the AD AP Carrys? its alot harder to "win" when you can't stand on your Node and keep it and hold it, if i stand on the Node with say Singed or Jarvan 4, i can defend 2 guys early game to death wich can give you a lead early to take in to Dominions late game. later in the game when either team is close to 100 things can change really fast so you have to be itemizing for the competitions,if you just think your gonna win because your winning 320 to 100 you will more times than not lose, if your whole team is going against tanks be ready to lose early game but later on things can change when someone is running around slapping people 1 hits and no one can stay alive.
Dominions best Champs IMO
Quinn(Bot) She is actually the only ADC that i can handle a Garen/Darius, Combo use E, then Q when they are close never letting auto attack stop by the time blind from q is over she can get back with E again keep doing this if the player is not wise you will solo a bruiser easy.
Diana(top) weak early in the match but after Blackfire and a few other items get ready for a 10 plus kill match and you can be afk
Lux(bot)Shield helps durability and staying near Bottom node all game later in game your be a kill Stealing beast lol.
Always be carefull playing any champ that can die easy example playing Vayne in this Mode can be fun if you have ample tanks and bruisers, if its all squish you squish too. hope this helps and anyone who says this champ does not belong or one is OP is a lie, of the 100 wins not once did i see any champ dominate over and over as far as the kassadin Op Dom threads IDK where those are coming from cause i have yet to lose a match that he was a part of. im more scared when i see Volibear,Singed,Jarvan Darius in the game against us, but i can easly pick those champs too so tanky/bruiser and AP/ADC if the group allows is my opinion.