Saboteur(28)/SIN(20)/BD(18)

[Konji]

As far as the build in the OP... Anni Bomb really isn't worth it in this build in my opinion. It is a slight DPS increase on fights with two or three targets, but is useless any other time. It saves you 1 GCD but does so much less damage than Puncture+Detonate that it's not really an improvement, plus it can only be used every 30 seconds. You'll do more damage if you pick up the third point of Combat Efficiency and Puncture (or Backstab in the patch, or perhaps 3% more dex from BD).

Slight increase? Adding Spike Charge to two extra mobs is far from slight.

As for Puncture+Detonate doing more damage, how can you say that. If that's the case then Puncture+Annihilation will do more damage plus the added bonus of a 2 second stun. But the really benefit is getting Shrapnel charge refreshed a second faster. And by reducing your rotation time (granted only ever 30 seconds) you have less down time on Spike Charge.

[Dinadass]

Slight increase? Adding Spike Charge to two extra mobs is far from slight.

As for Puncture+Detonate doing more damage, how can you say that. If that's the case then Puncture+Annihilation will do more damage plus the added bonus of a 2 second stun. But the really benefit is getting Shrapnel charge refreshed a second faster. And by reducing your rotation time (granted only ever 30 seconds) you have less down time on Spike Charge.

In any situation where Anni would actually apply the spike dot to other targets, I'd just be using shrapnel with my build and doing almost the same DPS.

Plus, how many raid fights in the game have 2-3 targets standing together that live for 15+ seconds? I can't really think of many. It's either one add that dies very quickly and won't live the full duration of a Spike Charge, or its 3-6 adds and you're better off using Shrapnel in those situations anyways.

There aren't enough points to get Anni, Demo Specialist, and Puncture, without giving up things like Blade Tempo and Combat Efficiency, which is not a good trade-off.