Bone Tyrant boss design issue.(Hole it spawns from is non interactable for skills)

So I decided to try out a warrior this league, apparently playing melee in this game is indeed playing on hard mode.

The boss design is beyond annoying as the giant hole it spawns from is clearly not functioning as ''enviroment'' making alot of attacks(Fissure, shield wall, earthquake) not even function as i am trying to hit the boss directly.
I am at the moment lvl 92 and dying to this boss because I cant hit it proper is beyond griefing me as im losing valuable XP to nonsense.

Please fix the skill interaction so that it always works as of now all I can see is 50% of player base playing a lame build and its the only way to play apparently which translates to 0 balance.