If you're leveling, find something with -1 level to +3 level mobs and set that shit to diff 0 and plow. Even at 44+ just blasting liveside guk or HAMLord isn't AWFUL if you have the clear speed to keep everything down in a decent time. Even mobs 1-2 levels under you give nearly a percent.
The Hole would be best if it weren't for the golems. They're no longer dangerous, but their hp pools suck. I've got a groupmate going to kedge to test out the exp as that's the only zone with a ZEM at the moment, but you'd need to do an instance camp of Qeynos Hills for an enduring breath earring off Hadden probably before you went there. Water places are also fucking awful for melee characters, especially against caster mobs.
Unless you're targeting very important rare drops, just go 0 or 1 for leveling. It negates a bunch of extra healers/fearers/mezzers that make stuff dicey.