For now the limit is rank 7 so you can only pick sorc c3(first circle at rank 5) or necro c2(first circle at rank 6). And Necro’s Raise dead skill is at c2, so it’s sorc c1>necro c2 or sorc c3. You could try this when we get rank 10
Most classes should be at c2 if you want them to become “useful”, most of the time the question is if you should pick circle 3 of said class. Like if at circle 3, there’s a powerful skill or great combo.
It’s advisable that you don’t pick a c1 class of a lower rank(you are at rank 6 and pick a c1 cryo or c2 wiz), or just have 5 or 6 c1 classes in you build. It’s not really bad to the point that you wouldn’t be able to reach max level, but it would be harder to do this.
Linker and Psychokino were exceptions that could be useful with only 1 circle during iCBT, but I’m not sure now. Cryo + Psy combo is still good, linker c1 got quite the nerf, but it shouldn’t be so bad to the point of becoming useless.
It’s depends on what you want. If you want to kill mobs together with the pets or you want to support them with buff and/or CCs. Example:
-Pyro c2>Elem c2>Necro c2 for pure damage and pets tanking for you.
-Cryo c3>Psy c1>Necro c2 for freeze and CC while pets kill
-Pyro/Cryo c2>Link c2>Necro c2 for support and faster killing at parties and/or with pets, Etc.
There’s nothing like a “wrong class” in this game, you could even go for a pyro c2> cryo c2>Necro c2 if you want. But there are some classes that needs some buffs to become better. So you should check some topics about them.