I do believe that L30 Int Hallow set is better than L30 Dex Hallow, because it gives you more Int, which boosts skill damage and heal amount. If you're sticking with Dex hallow, my advice would be to ask Demonic about it. I'm pretty sure he's the best 30 Mage who actually uses Dex. otherwise, talk to some other mages such as Fondling or Teach. Jun is still considered "ded" by many, but he's on at some times.
Bookmarks