It really depends on the situation. Combat dagger is rather gimped for everything, except raiding, and even then, it only truly shines on the main bosses, but when I say it shines, I mean it lights the place up like a spotlight, focused highly on your outrageous DPS numbers. This being said, Rupture is usually the way I go, considering it does more damage over all, and with the huge amounts of HP a boss has, the 18 seconds it takes to fully complete the damage output, is nothing. So, basically, keep up S'n'D at all times, and throw in 5 point ruptures as much as physically possible. The main problem with combat daggers, is the lack of combat point generation, which makes it hard, if not impossible, to keep 5 point S'n'D, and rupture up.
Edited, Aug 25th 2007 10:21:37am by Simpley