Up to 14-20% Strength, scaling with Peril.
Quell 2-5% of Peril on Repeated Weak Spot Hit.
-8.5--5.5% Charge Time on Chained Secondary Attack. Stacks 3 times.
Your Secondary Attack cannot be interrupted and loses 20-50% of Secondary Attack Movement Speed penalties.
My own Purgatus T5 build, i prefer the purgatus because it has a lot of clearing hordes without using ammo, that makes the psycher really stronger than with another weapon. I use my ultimate ability to push back pox hounds and poxbursters, that lets me avoiding their dammages and so i dont use the surge force staff to manage these. Ranged dammage stats on elites is available in the game, the site is missing it.