Solenar the slayer resets randomly and often during this encounter. I have probably 100 pulls on him and he is not killable by kiting him because he just resets whenever he feels like it. It’s incredibly frustrating to get the leaf & sinew and get excited for the fight only to have this quest bug out. I am using the same kiting methods as other people do on youtube video guides, I’m not doing anything crazy to make him reset.
There were similar reports weeks ago and it is still happening, please fix it.
Get a warlock and cheese the fight. Just make sure the warlock is not nearby to your fight after giving you recklessness otherwise proximity will reset the demon.
Also, the demons have something like a 10 second window to keep aggro otherwise they reset. Serpent sting does not reset this window, only damaging shots reset the window. So if kiting you have to keep tapping the demon with arcane, multi, autos, etc. you cannot tap with serpent or concussive.
The only real complaint I had was getting my tap batched which meant the demon reset even after getting immediately hit.
I have seen the ungoro demon get attacked by the opposite faction as I was fighting and nothing happened other than the demon disappearing. Summoning The Cleaner I haven’t seen yet.
I’ve had a warlock assist in three solenar kills. First time he warlock stood too close to the fight and the demon just kept resetting. No cleaner, no despawn, just reset. The other two times the warlock stood a little bit away from the fight after casting CoR and there was no odd behavior, just one attempt kills.