Erm, unless the 4 attack pac has nearly 0 slots, it won't be 11k nx. Don't worry about getting a dex robe for now considering you can use the lvl 64 maple knuckle untill lvl 80 or so. 10 dexing a bathrobe would be the best/most efficient choice for now. Focus on getting a decently scrolled lvl 64 maple knuckle as your first objective. That will be the best way to increase your dmg on the brawler.