Sorta tangential input, but I'm playing a scrapper SJ/Ninjitsu. He hits like a truck, but has durability issues at 37 with a mix of set IOs and generic IOs.
So whatever build you go with, try and sure up your resists a bit more. Maybe Rune of Power if you can squeeze it in, I couldn't (yet)
I use crosspunch and really dig it with the build for the innate recharge, as well as the FF+rech proc I have in it. It's animation is identical to one of SJs cones, so sometimes I double punch 3 dudes.