Originally posted by Trike:

So what is the difficulty rating on each biome? Meadows being 1.

I'm going to rate these based on if you have that biomes gear or not.

Meadows no gear: 4 (night +1)
Meadows full gear: 1 (night +0 to +1, night spawns vary as you progress)
Forest meadows gear: 5 (mostly for trolls) (night +2)
Forest full gear: 1 (night +1)
Swamp forest gear: 6 (night +3)
Swamp full gear: 1 (night +1)
Mountains Swamp gear: 6 (night +4, if 2-star wolves spawn)
Mountains full gear: 1 (night +2)
Plains mountains gear: 7 (night +1)
Plains full gear: 2 (night +1)
Mistlands plains gear: 4 (night +1)
Mistlands full gear: I'm not there yet.

It's really hard to rate, but oh well.

EDIT: from Swamp onwards if you don't have previous gear difficultly will be a solid 9 or 10. Bad luck also happens, more so with less experience - e.g. parking boat near leeches.