if u have spam dss and decent amount of hp pots u can either grp or solo at heretic catacombs or pilgrims necropolis. since its a dungeon most mobs have X2 hp or more which means alot of xp 4k and up
I also found that over near Giran where the medusa's/bugbears are is pretty decent xp when you are soloing, I lvl'd my alt (LE scout) 32-37 over there and it was pretty quick, I also had lotsa healing pots/ alacrity and spammed Dss which helps bigtime!!
Since u want normal hp monsters and not alot of people i would suggest breka orcs north of giran maybe its to slow for you but i lvled kind of fast there:) or else i would go to cruma marshlands left corner:)