Roar based hybrid bladestorm + weapon buff build for disruption. Use roar-boosted bladestorm to kill trash mobs and roar-boosted weapons (e.g. [Phage], [Phantasma], [Convectrix]) to kill armor stripped heavy units (acolytes, demolysts)
Calculations:
Roar 80% multiplies all DoTs (electric, slash, heat) by 3.24x, but this is additive to faction mods (+1.401x from primed faction mod to 4.641x DoT).
This also applies to bleed procs from Bladestorm, giving 2000 x 2.43 (power str) x 3.24 (roar double dip) x 2.8 (arcane [Fury]) x 0.4375 (bleed multiplier) x 1.25 ([Ash] passive) = 26,592 per tick (per second) or about 270k total over 10s.
With max combo (13x with [Venka]) and viral stacks this becomes 26,592 x 4 (combo) x 4.25 (viral) = 452k per tick which equates to about 4.5 million damage total over 10s, in addition to a smaller initial damage of 27k (no combo/viral) or 460k (max combo/viral).