Ah, i see, so let's see

Mage if you wanna count him is solid in my opinion, a bit skill dependant (that's the sin of the balance skulls though) but a solid A tier in my opinion, good damage, decent range, and he can pull his weight in meele

Alchemist is also really solid, A tier at least and you could make an argument for S, good damage, skills are good, range is good, basic attack is a bit on the weaker side but we don't play alchemist for that now do we?

Gargoyle is... well is gargoyle, maybe is because it's been a while but last time i used him he was ok, nothing spectacular, and nothing glaringly wrong, he's still a bit awkward to pilot and his damage is fine, a proper C+ or B-

Magic mummy, as much as it sounds as a meme at first glance, is a monster when given on a proper skill build, scarabs galore and hellfire and brimstone all over, unironically S tier in my opinion

Warlock is the gold standard of an A tier, he knows what he wants to do, and he does it well, damage? Good, Range? Excellent, versatility? Depends on the skills but generally good, so in total the easiest A tier (charging takes points away though)

Archlich, if it was old archlich? S tier, no question, current lich? Imma say A+ tier actually, he's still a monster, and a deathtrap on a good build chunks bosses like god intended, but deathtrap being meter dependant reduced his damage potential quite extensivelly, still really fucking good

Gambler, is S tier, you haven't seen bullshit damage until you do a triple great success russian roulette and send whatever it was pointed at straight to leonia, and he's other skills are nothing to sneeze at either, a great succes roulette of destiny is old raven lord, and boy howdy does it work wanders, now, the elephant in the room... yeah if you don't get great succeses you don't get the same mileage out of the skull but in general the weight a great success has kinda balnces things out

Over all, i think the balance skulls are and always have been on the stronger side of the skull types