It's not the regen. Snakes are supposed to have a huge regen, it's the dmg. I'm kaguya with 30 str, 24 ta and 30 speed, and Rebel meleed me out in 3-4 seconds. In the same time i melee + spam willow + camellia + shadow clones + some iron hit him with cluster. All i did was break through the sand armor and took him maybe to 40-50% health. In a normal battle you don't hit all the time, you move around and dodge his moves, which means its hard to get him low enough, even when it's 2v1.