In this video I will show you how to defeat Insatiable Despot in the dried-up trenches. There is a checkpoint nearby so make sure to hit that up first in case you die. For this fight I used the
Prometheus class. I mainly used the flame weapon to keep fire damage on my sword. From time to time I also used the fire storm when I get some distance for extra damage. When I wanted to close the gap and get in a combo I used the phantom assault. Also using blade dance will give you an increase in attack power for a short time. Just make sure to keep using these as your main abilities and you should be fine.
He doesn't really have too many moves and is
pretty easy to dodge. He will tend to do a jump attack from a distance at you for one. He will also do a slow overhead slam with his weapon, which is really easy to dodge. Sometimes he will do a spinning attack where he will go around in a circle while standing in one spot. He does tend to summon minions as well so take them out first. The achievement will pop once he is defeated.