Zalmorath hitbox is infuriating

This fight is infuriating. My DPS powers force me to get up close but they won't activate while he's wide open because apparently his hit box is not represented by his entire giant ass body. This seems to happen a lot when I stand inside his arm cradle. If this is by design the make the hitbox more apparent so we can aim at the right place, if not please fix it.

On the whole I would like better visibility of marks on him, he's so big that you can't see the mark over him most of the time and have to resort to scanning the health bar.

Agreed. The hitbox seems to be inconsistently targeting specific body parts. Sometimes I swear I'm meleeing his torso only for him to move an arm out to the side and my character zips over to his fist to hit it instead.