Double post just for a heads up.
While I dunno if it was intentional or not, there's a serious over-saturation of friendly civs, enough so that while I know there's other playables in the mod, they crowded out vanilla civs almost completely. While this probably (that is, almost certainly,) isn't an issue for adventure mode, it sort of strangles access to bad guys when using this mod by itself for civs in fort mode. presumably they also crowded out some of the hostile civs as well, as few were present on the one world I managed to generate. Half-elves in particular seemed to be damn near everywhere.
The only places with more than one enemy, if they had any at all, were severely isolated either by mountains or surrounding savage biomes. Note, that I usually use medium worlds for decent variety without everything being too spread out, with the standard civ count only raised by 10.
Once I removed the friendly civs (because I prefer to do my enemy tests "in the wild" rather than arena,) I started getting constant rejections - enough that it's made world gen almost impossible to complete, the example above was one of only two successes, and it was the only success with just this mod - over some civ or another apparently trying to be placed where there's no crops available. I'm not certain which it is besides
maybe the two permahostile ones since they're the only ones who could feasibly be placed somewhere that desolate.
But yeah, there's serious crowding issues it seems, and a massive overabundance of friendly entities, and there's some difficulty with placing civs.
I tried adding NOT_FREEZING for the permahostile entity biomes however, and I managed to actually generate a world, so I think it may have been them throwing that rejection type.
I hope this is somewhat helpful, since I dunno if the problems were on my end or not, but now I can actually jump in to test the cyclopes and others to see how they fare against similar opponents (I stripped them of their metal armor in the other game, and even their clothes were putting serious wear on weapons, so hopefully the recent rebalance update will make them much more manageable to fight.)