They should be dropped by players, not revs. Then I don't think there are things with higher priorities. Edge is very empty aside from people that are just starting out or dh'ers. The reason for that is that PVM'ing is a hundred more times profitable than pking unless you risk fight or something. This is supposed to be a pk server yet it is not possible to make decent money by pking without risk. While slayer for example easely gets you 1000-2000pk points per task while you don't have to risk anything.
Pking should be a viable method of making money on a pk server. Adding this for players or making the lower tier keys not give crap all the time would be a solution.