I have several draft posts that I never got around to putting up. This one is from 8/6/2011.
Here’s a list of the main places to grind. It is based on the amount of xp per kill. This list is not complete.
Tenacious Frost Giants, north and west camps: 800k-1.1m*
Tenacious Frost Giants, gate camp: 1-1.2m*
LSM Fire elementals: 1.2-1.8m*
Wandering spectres: 1.2-1.8m*
*HnG items through Chef Lukkif or other.