Well while looking for the best of both worlds (AoE and single target) I mixed a few points around and worked out that I think is a much better rotation. Annihilation does the same single target damage as a 1CP Detonate but cost 10 less power. You can also cut one cool down from you rotation as you don't need BS/Keen/Etc to get that extra Also once 1.3 goes live this rotation works better because the new Deadly Dance changes it's buff to work on charges so you gets hit to gain a CP doesn't benefit from Deadly Dance. I might be wrong on that but that how I read it.
Spike X5 -> Deadly Strike -> Annihilation -> Shrapnel X5 -> Detonate -> Spike X5 -> Deadly Strike -> Keen -> Detonate -> Repeat and use Annihilation Bomb as the cool down is up.
My gear isn't the best but here are some parses. The first one is single target DPS with no buffs but my own. Second one is against 3 target dummies and the third one is my stats.
Single Target DPS (743)
Three mob DPS (1505)