Burst is inflated due to all the buffs. Run until out of TP, Invigorate, then run out of TP again for a nice sustained DPS number.
The difference between the rotation is minimal, however, the main reason you'd wanna use Phleb after IDC is because of the Disembowel buff. Plus the DoTs just line up a little better (less clipping/downtime)
Edit: I just saw EMX's edit, thanks EMX :D
It's just difficult to say "Sorry man we need more DPS than this". I can help him with the rotation but can't do it for him, you know? So I guess simplifying it is the best way to go right now. He did OK in T1-2, but those aren't as DPS intensive.
