Just pulled a 6 (kills) and 2 (assists) on Canyon with this build. I do have one small change as no matter what, I find myself running out of ammo regardless of that extra 37 from the half ton so I put in the small laser.
A SL won't do much, mind as well get a JJ. Is finding this a bit less effective than I would like to hope for.
I would still think the old Shadowhawk style build would work better... 3x AC/2s, more speed, more ammo...