The vanilla biomes either exist on the map or can be made. I am not sure how others that add biomes do worldgen, and since I am providing a world that already generated I don't know if they will work. Also, ores that populate after killing bosses might be hard unless you puts lots and lots of dirt/cobble in the world for it to replace them with the ores that spawned. Other than that, the mobs that spawn in the other mods will spawn normally once you have the required biomes on the map. My mod wasn't ever meant to be played with other mods (that are currently out, some one could make a mod that was skyblock friendly), but doesn't mean it won't work, just not as much as it would with/out my mod.