1-10 dragon castle
10-18 highlands ( dont even think about going to great mines
)
18-26 venom swamp
26-30 cave of ruin
30-43 spirit spire
43-51 southern plains( beware of bloody ninja and blind swordsman )
51-60? southern plains( on young blood tigers and amazons : beware of great tiger)
60?-? bamboo mountain ( you can capture evolved mounts here)