Kalvalax is unfortunately deceptively bad for CB. The problem is that, given enough time, he'll eventually fill the entire debuff bar with poisons, since he'll keep extending the existing ones and keep adding new ones.

CB:

Fayne (all debuffs)

Sepulcher Sentinel (block debuffs) - on a 4:3 rotation, use DEF up on turn 2 if she is last, turn 3 otherwise

Ghrush (leech) - disable A2 and A3

Fatman (ally attack)

Grizzled Jarl (DEF up)

Arena:

Your basic comp idea is solid. Shazar + Gorg + Visix should be able to lock them down. I expect the problem is your gear here. For this team to work at higher arena levels you'll need Gorg to be at 280+ speed, 300+ for G4. Visix should be running 300+ ACC. Yoshi may even make a good choice for a 4th here - he'll let you survive when you lose the speed race due to his passive.

Thanks for the reply. Yeah, I had the same feeling that may CB team wasn't the best. I'll see if I can replace Ninja with Fatman for now, as I will be 6 starring him in the near future.

As for arena, yeah I don't have top tier gear, as I hate farming and I understand that I cannot advance much without it. I'll try putting Yoshi on my defence team and see it the attacks drop a little. I don't expect any progress in arena, but I just want to maintain my current rank in Gold for now.

Thanks for the advice!