I use a clr to do my PLing up until about 65ish.
step 1: take clr and PL'ees to Cresent Reach to the bridge to the highest lvl undead.
step 2: park one toon visible on the bridge and make sure you temperance him and leave any others IVU.
step 3: make sure clr has zero DS on and then run around and aggro undead (you might need to start with smallish pulls unless you geared the toon.
step 4: stand about 80 feet away from the bridge and let all the mobs catch up to you. target lowbie toon and cast heal over time then target one mob and cast blood of whatever (you really want the clr to be at least lvl 95 for this).
step 5: rinse and repeat until lvl 25.
step 6: take your PLee to blightfire moors. You have two options here. Undead in NW of map or bees on far east side.
step 7: if you chose undead you will need to pull no more than 5 at a time and run them back to the toon, root them using your AA root, move away then case mark of whatever, then attack them with the PLee. Rinse and repeat until 35. The reason I say no more than 5 is because your root will break and then the clr will get the kills. If you choose bees then run your guys to that area park them in a safe spot and round up all the bees that are kos, some are not and wont attack so ignore them. bring the train back to your toon and cast some heals on self, make sure to disable your aggro reduction AA. use your PLees lowest pbaoe spell a couple of times (make sure you don't get aggro and don't sit him down until all are dead). Once all have been hit have clr pop his DS from his cloak and let them die to it (helpful if you have a mage or clr for additional DS but not required).
step 8: if you chose bees, then after 1 or 2 pulls go into the hive place next door and do the same pull trains and repeat until lvl 35-40 (you will probably get bored at 35)
step 9: take the team to gunthak and go the area just before dulak, there are a lot of mobs there. repeat the bees method, make sure you get the mobs up near nadox zonein.
step 10: go into nadox over to the undead side. DO NOT waste your time with the live trolls, too many will gate and waste your time.
step 11: if your clr is high enough you can pull the entire undead side in one pull, you will need to walk them back because it will lag out the zone. repeat bees method. you can pull the alien type guys too, but i usually make them a second pull to allow the undead to respawn. Do this until 52-55.
step 12: take the toon to black feather roost and just use root / mark and let the toon do the killing. you should be able to keep 2-4 in camp at a time and it goes fast. do this until 60-65 depends on your patience.
step 13: buy spells and work skill ups for the next 2 years.
This is by no means the quickest way, but if you don't have an sk, bard, druid this will work fine.