For the best time to reward ratio, I would suggest this:
Go to Doom, to the poison room with a cu sidhe. Before you go into the room, precast invisibility. Invis yourself (while riding the cu) after you spawn the baddies, then dismount. Keep your pup inside the room while you ferry the bones, maps (if they're interesting to you) and gold back and forth to the bank.
When you have more than 1000 bones in the bank (shouldn't take long), fill a pack beetle with 990 and give those to the bone collecting lady. Then return with a greater dragon and 10 bones, spawn the bone demon and kill it for the skull. Then you can sell the skulls for gold.
Or, since you have a lot of luck, find any named monster who doesn't have an area effect, like Coil, Lurg, Miasma and so on. You'll get a lot of gold. If you pick your target well, you won't have to gheal much (use a GD for most) and you have a good chance at some valuable artifacts like totem of the void or bloodwood spirit. You can also work on your honor (BIG bonus!) in the process.