if you want to get gold by just killing and looting, then 5 druids running around casting starfall(40yd radius aoe that moves with you) just clears entire areas effortlessly. coupled with autoloot its even got me grinding mobs again just because its so insanely easy. The main issue is finding enough mobs.
Im on a pvp server and starfall doesnt discriminate, so its got me killed a few times when ive tickled a L100 DK hiding in the bushes or whatever