Kuro, extreme diff

Zabuza, low - mid diff. One water prison and ts all over for kuro.

Zabuza, neg - no diff.

Smoker is the only East Blue character I could see as jonin level

No one can harm smoker without haki

He def has a weakness that we don't know of, kinda like Crocodile and liquids.

Either way I was just arguing that no other East Blue character has the feats to be jonin level