I have suggestion about what I find at first sight:
1) PvP balance (old like Mu World), skill tree of BK - very badly nerfed, main ML skill was changed - Mace Mastery need return chance to stun opponent not ignore defence. It can be work on CS / Duel for exemple. Its main problem.
- I think if you want to make ML skill for reset server need to think about charecters speciallization, but first up HP/ Def /SD /DMG/ and Weapon Mastery skills.
About speciallization I think for BK need:
to add on ML skills: for exemple while equip shield add more +Defence/HP / then outher charecters (BK in my vision at first is Def /HP charecter)
2) And bug with No animation from Reflect dmg when use Fenrir! It is very weired problem.