Quote Originally Posted by Seraphor View Post
DRK for example, the dps combo would still deal more damage, but the emnity combo would generate more blood, translating into more dps via bloodspiller.
Neither option is the best option all round, because you'd still want syphon strike for the mana regen, it would just encourage you to throw in an emnity combo now and then for the blood.
Bloodspiller is 400 potency, or about 33% more potency than Souleater. Going by a GCD basis, the average potency of the Souleater combo line is 150 + 250 + 300 = 700 / 3, or 233.3. At a baseline, taking no other factors into consideration, bloodspiller is about 166.7 more potency than the average GCD in Soul Eater. This means, dividing by 50 blood, Blood is worth about 3.334 potency each.

Dark's two combo lines are 670 potency (Threat) and 700 (Souleater).

Soul eater additionally restore 1200 MP (1/2 a dark arts, so 70 potency) and 10 Blood (33.34 potency), so Soul eater's real potency for the combo line is 803.34. In order to 'encourage threat combo' for additional blood, you must gap around 133.34 potency, or nearly 40Blood to make up the loss from just doing Souleater spam.