The strategy I used was to do as much damage as possible, because it seems that when you do a certain amount of damage the fishermen guys will throw nets out, and if they land it'll stun Fembris for a good period of time, I cleared as a 160 Bishop
Dude, I feel ya. I'm playing as a bishop and I'm stuck at this part.
It wouldn't be so terrible if his HP didn't reset every single time, or if the fishermen actually managed to stun him more than once.