btw . you CANT hit 50! enemies. There is not unlimited number of targets on WL... you dont know that? and some of targets can evade your hit. and why you wonder that you should hit for 6000 p atk ? mobs have p def too ...
EDIT: Pole mastery with NO enchant give you 19 targets with pole, if you have SA in pole that give you +4 = 23, fell swoop (+5) = 28 ....