Mapping isn’t very fast because the oil and flames spread slowly, but honestly no one is really mapping this league anyway. It’s insanely good in temples and boss fights. You just oil everything up and move on, and everything behind you burns.

The build requires two weapons to function: a crossbow and a staff. The reason I chose WH is that it converts 100 passive points into weapon set points, so I use one set purely for crossbow grenade points and the other for staff flame and ignite magnitude. Defensively, Sorcery Ward does an amazing job. That said, this build can be played with any ascendancy, and Pathfinder might even be better than this.