PV (Khoan the Survivor NPC at either west district or by the elder of Arch)
FC (Frost teleport at the Illusion stone)
GV (Spiritual Disciple at 1k streams, full squad recommended)
GV is generally the best, plus you get nice coins/ec from it
PV is the second best, especially good for classes with many AoEs
FC is the worst of the 3, but is still a decent way to get exp