What synergy/minor ability tweak would you make to a champion to make them viable or a bit better?
I'll start by doing one champion of each class.
Sentry - 100% chance to trigger the heavy attack form, warps transfer from fight to fight no matter what (sig)
Diablo - Something like Sabre/Sasquatch synergy to make him not run out of potions
Falcon - AAR cooldown reduced, AAR length tripled. Also, every hit of his combo meter passively reduces ability accuracy by 2% and increases attack by 4% to a max of 60 hits.
Bishop - Start degenerating from too many prowesses at 60 instead of 30
Civil Warrior - Each passive armor up increases attack by 15% (similar to Colossus)
Hela - When charging a heavy attack to gain fury buffs, evade all incoming attacks (Just like Quake)