you could just play phara vs them u know and it would be gg, even echo is really good as all of their ulties are pretty nice. Healing? get zen or ana or junker queen(she most be a good queen). Another good pick on tank is zarya but she most understand the match up. The game has tons of counter mechanics and abilites. the question is if u and ur team are willing to use them.
let add one more. Vayne amumu karthus was considerd the best late game champions in the game.