that would also be a viable option of groups fighting in lab, currently the respawn rate is something of 45 mins iirc. i've cleared up to upper dogs from ent, cleared upper dogs, and went down and started killing about half of the lower dungeon before the ent mobs started respawning, and i was just duo'ing with myself (65 necro) and my friends 65 druid. while mainly im there for furs and money, it would be nice if i just had to camp a static spawn area like upper dogs for exp, but being that the respawn isn't until say 45 minutes, im forced to move on and go fight other monsters.
litterly, i can by duo'ing just a necro and druid, clear upper dogs in about 15 minutes, leaving 30 (still assuming its a 45 minute timer) minutes to just twidle my thumbs. by changing it to 30 minutes, like many other zones, would give groups reason to hunt here again, as there are many "xp camps" in this zone (entrance, ledge spiders/dogs, upper dogs, lower tunnels, and fort) and each with a named to kill.