What would this power look like under Only War/DH2?

Focus Test: Willpower -10? Or Willpower -15? Or Willpower -20?

Range: 5 x PR (I think this would be pretty straightforward)

Effect: Psychic Blast, Radius = PR? PR x2?

Damage Scaling: 2D10 Plus... 4 x PR? 3 x PR?