Not sure what I'm doing wrong. The one I can't complete is an elite task called Spec'd out

I'm using dclaws to spec then tele'ing home to recharge and specing again til dead. First time it failed I figured it was cause I had ring of suffering on so he was taking a little recoil damage. Took the ring off and did it again, it still isn't passing. I'm only hitting with specs.
Anyone know what's going on?