the Overthere has a wide range of mob levels, and plenty of room for kiting as long as you pay attention to wandering mob pathing.
After that, the Burnt Woods ( yuk yuk yuk) and then Skyfire, as posted above.
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Not having been on a TLP server, I assume though you still get mercs? If so, and Veksar is open, necros rule there.... using a pet tank/charm. Lotsa awesome gear to farm (the haste belt always sold well) I used to box a cleric or druid back in the old days, lived in Veksar for 6-8 months funding the guild's raids.
Chardok , once you are 50+, is another awesome farm zone with plenty of undead to charm. ( IE use a charmed mob to break a camp, then your pet can handle singles )
Course, a lot of spell lines have been back filled so, your mez and slow lines may be better now a days =)