Cave Missions because u get fairly decent exp and some good drops in better modes
I like the mines. The enemys are easy because most of them fall down or get stunned easily, and you can get some good stuff there.
I preffer the mines in epidode 1.
I play in Caves ULT and Forest ULT for fun.
Mines. Hands down for me it is the best experience and I like being able to knock stuff down so easily.