I'll try to pull a combat log tonight.
I'm doing the exact Single Target Rotation from the guide here including Rune of Power, using Alter time and Mirror Image. According to Skada,
I'm not great at managing Mana all the time. But I don't think that my increased mana usage % should result in the low DPS I see consistently. If I pay extra close attention to my bombs and never let them fall off is when I get into the 50k range.
I'm not taking any potions at this time.