For all you Dark Knights out there

A 2hko'ing DK should be fine for partying (this isn't very hard to get, really, as most who berserk at 150 should do this). Before then, yea you might have trouble but when you 2hko the only thing holding you back is preconceived bias. Aura is going to help you berserk more than achilles is (esp. by 150) and will help you keep your damage within "party acceptable" ranges.

Unfortunately, PA DrKs will take a LOT longer to ever 2hko Newts with anything other than sacrifice (and sacrifice + zerk is a generally bad idea - note that there are some exceptions). PA DrKs used to be party kings at large-mob maps, and are now forced to pretty much solo, as we don't have enough of a damage output on maps like newts to be competitive for party slots. Least we still have crimson guardians...