Honestly,I keep anything over Lv.60.
But here are my main maps...
Ruby Waterway of Fear Lv.91
Plenty of Gem Slimes,Pale Whales and Hammer Horrors
Emerald Abyss of Fear Lv.85
16 Floors,MKS on every floor,and Plenty of Hell's Gatekepers
Emerald Tundra of Doom Lv.91
...Still no effing Blight Nights...
Ruby Maze of Dread Lv.91
PKJ at the last 4 floors.