Within my normal duo (monk/mystic) I often wonder if I'm wasting my time and power doing solo HO's. The extra damage only seems to be around 100-150, which I do in a single hit anyway. I don't need to do taunts separately to keep agro in my duo (Dragon Stance keeps it just fine). So that power spent doing the final taunt to complete the HO seems wasted, and if that keeps me from doing one attack I've not gained anythign by the HO damage. Of course, if I get the AE one and am fighting multiples it's of use, or the mitigation-boosting one...