So I am on the quest to make my climax spell hit the highest amount of damage. I was told dark sunset staff + 5 or 10, forgot, is the best staff for hex damage. I tried every hex and for some reason the dark sunset staff doesn't work with hexes. at all. If you know how to make the staff work with hexes, let me know. Anyway so I am using the black witch's staff + 9. So far I've been able to do up to 2,400 damage. However there is a video where someone does 3990 damage.
So what are the best items in the game to absolutely max out the climax damage?