PoE Pathfinder, Blade Blast of Dagger Detonation builds

Path of Building I stumbled across Blade Blast of Dagger Detonation while trying to squeeze some DPS out of my PF brand build (don't recommend). This skill has insane flat damage scaling at 600% of dagger damage. With physical = lighting = cold conversion, you get 600% increased damage from the Nebulis. This build was designed to be defensive and succeeds. I can stand next to a T16 6k wisp Stygian Spire and just blast the demons as they surround me. We get 90% max element resists with a lot of help from charms. We get 93% of physical damage taken converted i