Don't swap out gear if you don't want to, but you wont peek your damage on WS. I level both DRG and DNC as my mains, and I will say that TPing in haste gear (with a little ACC and the rest ATT) and WSing in ATT/STR gear is the best way to go.
Heck I even go farther with DNC, in that I swap to +cure equipment for my waltzes, and ACC gear for my steps