I tested out my previous sab build and a pure sab build this morning.

5XSpike, Detonate 5XBlast Detonate

51/10/5 sab/nb/sin
390ap
522 crit

510dps

29/19/18 sab/nb/sin
390ap
522 crit

560dps

I've read that 5X Fragment actually does better dps than 5X Blast.

Next I'm going to try NB/SIN/Rang.

I've been trying to avoid ranger because of the pet issues and melee because of unfriendly unsustainable melee damage but whining on the forums isn't changing anything.