Anyone else equipped Guts CEs for the final battle?

Castle of Snow Herc for the win

I use tamamo cas gill and artoria archer, he never get to use his np

It’s not that good using guts spam unless you only have one servant standing. Goetia does mostly AOE attacks so after you use your guts, he’ll just AOE and kill the servant again.
From my own experience with Herc and castle of snow. With four guts, he died in two turns :(
(3 turns if you include the evade)