Bad HitBoxes On Bosses For Minions - Example: Zar Wali, The Bone Tyrant

Some bosses like Zar Wali, The Bone Tyrant, have terrible hitboxes that make minions terrible to play with against them. Doesn't matter how many debuffs, curses, etc., that you have on them, like no damage it dealt to them, because most of the minions' abilities don't hit the boss. I believe this is an issue for every boss that is outside of the main arena.