Post by ShiftError
I would say that you can do better. Your spec is missing some good things.
This is a good build to start with. You don't really need the 15% extra damage on FB since it should be stressful enough just to keep the bleeds/SR up with your gear, and the extra healing received and a panic button is nice to have.
I don't know about what rotation (yes, priority system) you use, but what you should use is:
1. Savage Roar up.
2. Rip 5 Combo Points up.
3. Rake up.
4. Mangle debuff up.
5. Faerie Fire up.
6. When you have checked all these, shred! And don't let anything drop of for more than a few seconds, ideally you want all your debuffs/SR to have 100% uptime.
Hope this helps, good luck!