I say; there is no "best" team, the best team depends on the situation. The best setup is Tank - Sharpshooter - Healer, and in my opinion, those would be Frank, Colt and Pam, but it depends on map and mode. In open maps, they´re okay, but in close maps I´d replace Frank and Colt with Bibi and Brock/Gene (mode-depending). And in Brawl Ball or Gem Grab Poco can be better, since his healing comes directly, Pam´s is over time. But I´ll stick to my mentioned crew.