Let's take a look at the skills he's using:
# Dragon Slash (Elite) - Just a dmg dealing skill, but it also provides adrenaline for him
# Distracting Blow - Interrupt. Shouldn't be much of a problem since your mending can keep you standing
# Seeking Blade - Again, just dmg
# Healing Signet - This will be the biggest problem to deal with. If you we're to bring an interrupt, this could get more interesting.
# Jaizhenju Strike - Dmg
# Signet of Strengt - Dmg booster
I guess if you bring an interrupt for his heal sig and you are successfull in getting to him and pulling him away from his group, this could be possible. Although I doubt it.
i managed it, just bring distrating blow for his heal sigs, then run riposte and deadly riposte. ull have to take a few points off from smite for the tactics but takes him down.
Sounds good i got so tired of trying whith my W/N white Axe skills(i know iam axe warrior what do i need a sword for Gold Gold ) so i though it might work as 55hp but wasent sure but from what ive heard it dosent seem impossable