after few research in forum, i come here for post my question is: which weapon is better (only for pvp, dont care about pve) superior dagger mastery lv.1 â€“ passive skill increases str+2 and p. atk.+344 when a dagger is equipped. also increases atk. spd.+25% and vital spot attack rate.+5% depending on your str, may reset your skill reuse timers or double your skill duration. superior dual dagger mastery lv.1 â€“ passive skill increases str+2 and p. atk.+344 when you use dual daggers. source: http://l2gc.com/classes/othell-rogue/ in some forum i see many ppl say: single dagger for pvp its more burstly, hum k, but look this **** sa on single dagger, dual dagger have damage up. anyway its discuss thread, thank you all, hf !