My guild did Al'ar and VR on patch day (were doing Solarian but we had new people that blew us up a couple times, and he bugged out). The results are in on 19/42/0 vs 11/28/22. My gear between the two raids I'll be comparing is pretty much identical.
Al'ar
19/42/0: 600 DPS.
11/28/22: 788 DPS.
No differences in playstyle from one kill to the other. Killing adds in P1, killing Al'ar in P2. Didn't die on either fight.
Void Reaver
19/42/0: 733 DPS.
11/28/22: 734 DPS.
I did not have might for the Hemo kill. Our paladins tend to be lazy about buffing. So even with inferior stats, Hemo outperformed Combat Swords on the worst possible fight (bleed immune).
High Astromancer Solarian
19/42/0: 795 DPS.
11/28/22: 1194 DPS attempt 1, 1383 DPS attempt 2.
Completely and utterly owned. We got Solarian to about 50% both attempts. It's safe to say that my DPS would not drop a whole lot over the course of the whole fight, since Hemo is not cooldown reliant like Combat Swords is. I got Bloodlust on attempt 2, but not on attempt 1 (our shammy was new and didn't know to blow cooldowns early). Because of this, you can use attempt 1 as a lower bound, and attempt 2 as an upper bound. I also didn't get the Dirty Deeds buff at all on this fight. I did not DPS the adds in any way, either. I just wait for priests to spawn, and then lock them down.
So, the conclusion? It might be a bit early to call this, but on favorable fights like Solarian and Winterchill, Hemo is the sh*t. The vastly superior damage:energy ratio, combined with the very steady DPS make for a rock solid raid build. Tired of the cookie cutter 19/42/0? Pick up Hemo, you'll be glad you did.
As far as the debuff, with a caster heavy group, it was used up in about a second and a half. A raid could easily support 3 Hemo Rogues.
Edited, Nov 14th 2007 3:38pm by Nooblestick