Worstgen
Finalbeta
He seems to be quite more than just veteran level. Probably YC3.5 or something.
Cinera
He easily deflected Zoro's 720 PC, and was able to fend off a blood lusted Zoro while being pretty casual throughout the entire affair.
Finalbeta
Indeed, he is very very good. But I believe he isn't holding even more power. Jack should overpower him in his Mammoth form.