Splitpaw. If you're decent with using your pet and have vitality, you can tear up the Splitpaw instance to the tune of 15%ish per run through (30-45mins) with some 2-4g worth of loot...including also 2-3 chests with adepts (and yes, necro spells drop). Great zone, gets boring after a bit, but at that point switch to grouping or soloing elsewhere in the TS or Nek as others stated.