In my opinion the character tiers for the campaign in no particular order are
A tier:
Galilea
Kleese
Miko
Orendi
Oscar Mike
Pendles
Whiskey Foxtrot
B tier:
Alani
Attikus
Boldur
Caldarius
Deande
El Dragon
Montana
Pheobe
Rath
Reyna
Shayne
Thorn
C tier:
Ghalt
Melka
Ambra
Benedict (I know he is a pvp beast but just try and solo the sentinel as him with advanced/ hardcore on)
Isic (now that he can’t infinitley defend a point in his ult, he seems weak)
Kelvin
Marquis (except for the algorithm and archive he is B tier)
Toby
Obviously using specific gear can change some of this, like stacking +50% attack speed on attikus will shred anything but the last stage of Isic. Normally I would say that the melee characters are pretty good, but there are quite a few spots that they become significantly less effective like the final part of the Isic fight, or fighting guardians/sentinels.
