I would check Cyclops Depths. There is a variety of mobs to choose from around that level and up until RDI Lab, the coolest place on Calypso.
Have fun!
I agree with Evey about Cyclops Depths.
Just a thing, the mission broker to open the cave seems...broken (Brendan Smith).
It didn't delivery mission anymore in my case (support have been informed).
If other can confirm...