hmmm i remember kiting the pirates in timorous deep until around level 54, at which point they bottomed out. i think i did werewolves in PoNightmare but turned to doing AA xp from them, which was quite good. i learned about PoJ kiting much later and regret not going there earlier. here's what you do:

load up your best four chants, charm, invis, heal, and selo's. enter plane of justice and run down to the Deathrow - its the long hall with Enforcers along either side of the wall, doors leading to rooms with named mobs in them, and a sentry guy at the end with Mavuin behind him. now sing Selo's and run down the hallway, collecting mobs as you go. avoid going too close to the Sentry guy for now, as he can't be charmed and makes things difficult. now just charm kite. learn to use the space you have - when you break invis, pull the pack down one side of the room, wait for them tocatch up to you, cross the room and run back up. they die very quickly. for even better experience, work the Sentry guy into your kite - note he doesn't summon, but does hit hard - and when you get down to one or two mobs in your pack, sic the pet on the sentry to wear him down and then kite him when your pets die. this is great for cash and ethereal parchments, too.

sound boring ? well there's plenty of other places, just use your imagination. if you're skillful enough you can kite Temple of Droga. plane of innovation is decent, but there's seemingly random summoning mobs.