I used to do this pre-bc but as holy, it was harder then but i managed by holy shocking myself and concecrating as much as possible with ret aura on. Was doing the whole thing in 3 pulls as well. But now it is even easier to do. Only problem is the repair bill you will get if you are holy, i havnt tried prot cause i didnt feel like respecing my friend's pally.

Tho since then i have found better PLing strategy, but i am not a multiboxer (wish i had money to upgrade) so i am sure the PLing with pally is faster for multiboxers. Oh BTW, the more low level you bring in the group, the better the XP will be, so if you DONT have a full grp, ask some noob to PL them for a small fee to help cover the repair cost, shouldnt be hard to find.

My new way of PLing in cathedral lv 20-40 is with a Warlock or a Spriest. But you might need a decent amount of gear to pull off but is much faster. start by doing some testing with your DoTs, see if your strong DOT is able to kill a mob without casting anything else. If it is, then go pull 8-10 mobs (10 if you are quick and good) and bring them back at the entrance, have your lowbie sitting at the end of the hallway where he is still in range of the mobs to see them, make sure you pull the hallway first so you dont aggro. then DOT all of em up and as the first mob you dotted is about to die, zone out. Now your low level will receive full amount of XP for each mobs as if he soloed them all (about 470xp per mob at lv 20, about 700-750 per mob peak at lv 36-40, some mobs are worth 50% xp for some reason i dont know) repeat until you reach the cathedral gate and reset the instance (it is slow enough to not be bothered with the 5instances/hour). lv 20 to 34 or so will take you about 13-17min per level and then past 35-40 it will take a little longer per level to about 25-35min at the end.