Why is no one mentioning DPS DTs ? =/
Imo DPS DTs can do the most single target DPS (most of the time DPS depends on the aggro of the tanks :P)
Only problem with DPS DTs usualy not topping parsers is there aggro. Funcom gave them basicly NO minus hate feats or aggro dumps so they pull aggro so fast.
Heck even with a good geared DT you can top parsers in BRC and HMs with a TANK spec (true story Ive done it myself, its not so hard) !