[Balimon]

Droga is easily the best out of these, it's the top active cash farm you can do clearing green trash. Ice giants and Hill giants are okay but even at their best are probably only half as much as Droga. Loramin is right about Grobb, and Kelethin guards are also decent plat per hour.

Another spot to consider is Mistmoore gargoyle farming, it's equivalent or slightly higher than the city guards and has chances at some sell able loot as well.