[Lazortag]

The most efficient trio would obviously involve at least 2 pet classes. No warriors or other melees - that's just crazy talk. One of the 3 also has to be an enchanter (I count them as a pet class) because enchanters are just wtfawesome. Since mages get kind of mediocre in Kunark, I'd pick a necromancer for the other pet class. For the third, I'd suggest a shaman or a druid, since both can heal and have decent nukes, while the Shaman has a pet and the Druid can port, which make them both very appealing.