[Help] I'm with a project for mu online season 6

Hello!I'm with a project for mu online season 6but at the time of setting up bv pvp I encounter some problemsTwisting Slash magic is taking a lot of character damage, but it's a lot of damage, not normal. inquatus the magic Death stab does not take much damage as it was to take, even using the punch takes more damage than using the skill, can anyone help me?
Hello!I'm with a project for mu online season 6but at the time of setting up bv pvp I encounter some problemsTwisting Slash magic is taking a lot of character damage, but it's a lot of damage, not normal. inquatus the magic Death stab does not take much damage as it was to take, even using the punch takes more damage than using the skill, can anyone help me?