How to fight Arishok as Warrior?

I'm always a warrior but I'm not the one to ask for strategic advice. I just swing and swing until he's dead.

Beat him as Sword and shield warrior.", Reaver /Beraerker (optimal). Had far less trouble than the mage. Tidius, yes.. but never felt any danger: he even imapaled me with his sword a couple of times, just shrugged it off and devavoured him.

Rouge with decoy felt almost like cheating.

Mage was a problem. One wrong move and I was dead. Then respaced everything into entropy and killed him. He is actually very easy if you know how to avoid his AOE and impale.

Edit: on nightmare.

All played on Hard. My two-handed Reaver warrior was fishing for stuns. Used those stun grenades (can't remember which they are called) also Pommel strike and Devour with the stagger upgrade. I remember Devour being really useful. Otherwise just running around, attacking when opportunity rose. Maybe consider getting a frost/nature rune to your weapon since Arishok is weak to those.
My mage actually had the easiest time while my Rogue had the worst (stupid me for not having Decoy). My mage used Entropy spells to lower his defences, then spammed frost/nature. My duel wielding Rogue... damn, it was pretty much: get hit once and it's over because the bastard stunlocks you. Maybe I should have used a bow or something.