Bosses AI is a shame as all the thrall AI in general. Please hire new coders for the AI part and balance the difficulty.
There are guides everywhere on how to solo bosses by exploiting this bad AI. When a boss has no player or thrall in malee range it should spit or throw something with great power.
I was exploring the Unnamed City killing dragon hatch lings for some demon blood and I decided to go into the Citadel of the Triumvirate to see what is inside. I am a level 56 archer with hardened steel weapons and Stygian raider armor. With this low set up and a greater wolf pet I was able to solo the giant snake world boss that lives there.
During the fight I observed the fallowing aspects:
He hits very soft. Maybe that is intended because he has deadly poison, but
He doesn`t poison. He has the glands build for poison. Not a single poison stack on the greater wolf or me.
The serpent has a little hit pox that is almost impossible to hit with arrows. I was very close to him with Q target lock and maybe one or two from 20 shots landed. I had to go malee to do something. This thing applies to the new snakes that ambush you from the sand and make that terrible sound that you can hear from a really long range. However, those guys can kill you with poison if you get more than two stack of poison on you.
This was the first world boss that I killed on my own. Too easy and too bugged.