I don't understand this monster's fight. It punishes you for hunting it the "proper" way. The loop from what I understand is:
>break shell
>focus attack on the exposed ass
>deal massive damage
But going behind him unlocks his wide as fuck 360 attacks. If you're infront of him he uses extremely linear easily avoidable attacks plus hitting his glass jaw is more effective because he's a toppleslut, and it's like just 5% more damage if you hit his ass anyway.