I don't often get the chance to purely DPS these days.
However, I find DPSing is actually more about gear than spec. The AA choices for DPS are pretty obvious, as mentioned above, spec anything that increases damage or offensive skills/stats.
As far as gear goes, you really need to take in to account your group at the time. For example, if due to IA etc you are getting or proccing to more than 100% DA, then +CA gear is going to have more benefit than DA gear that takes you over 100%. As mentioned by Traxor, same appiles to evaluating each encounter, think about the mechanics involved.
And a final point about gear, just because it has a fabled tag, doesn't always mean it is going to be better than a legendary item, look at the stats not the tag.
Daae
Ascend