Help with storming the garrison

Tavore1138

I thought it might be worth asking here while the servers are offline.

I have a level 40 NB, main focus on siphoning/dual wield skills...

I am having problems with the final boss on this quest, the one in the courtyard opening the cold harbour gate.

Essentially after trucking throuhg the daedroth, mobs and Papus with some effort I then get killed very fast against this guy and his various daedra.

My usual approach is to use some prolonged suffering, range with swallow soul or flying blades, use blood craze if caught up close & ultimate with soul tether as required. I try not to run out of anything so i have stam to block or dodge as required. Trey and take out his daedra while he is block stunned if they areee a threat but otherwise just play keep away in case he summons something more annoying. I find with this guy I can get him down to somewhere between 35-50% of his health at which point I get one hit killed.

I'm no 'expert' gamer but nor am I a total novice but this one is bugging me - guidance would ne appreciated.