Lvling on Sullon Zek

[Ciphon]

I have a lvl 22 Nec on Sullon Zek and I am wondering where to go for best xp now? Don't really care about the loot I just want the best XP possible. Any help will be greatly appreciated.

[Schaeffer]

Echo Caverns, solo the Bogling Scouts on the Fungus side, then move to the needilites at 25ish