So I fucked up and tried to setup a save that could access every ending. However, this save has Nas'hrah on my team and I didn't realize Gro Goroth just nukes his ass in a cutscene.

I looked into it and apparently there is no way to remove this fucker from my party. Is it feasible for me to beat GG with only 3 party members or should I just restart?

I'm running Mercenary/D'arce/Ragnvaldr. Mercenary is loaded with spells, but I have to spam Healing Whispers to not die. Ragnvaldr has Blue Sin and the increased crit accessory, he's my main source of damage. D'arce has absolutely nothing of value.

I've looted basically every loot source in the dungeon so I don't have access to shit like Blank Scrolls for easy power increase.