Why you dont use bombard to stuck him that the has to waste Stamina?
Second if you run bowbar main run on the other twohand... for executioner, you could also run S/B-Bar and maindmg the enemy with heroic slash,puncture and animationcanceling.
If you are stamina sorc you have to use a buffbar)
But using wb is good against bad players but if you have to fight good people try it pls