i am running a server that uses biomes o' plenty as well as realistic worldgen, and non of the divinerpg mobs are spawning in the non vanilla biomes.

Are you running the latest version from github?

I have been testing with some friends on private server with Biome O Plenty for over a week and the mobs have been spawning fine in Biome O Plenty biomes.

Update: I just went into SP and verified that Desert DRPG mobs spawned in the Lush Desert BoP biome. I think your problem lies with the Realistic Worldgen mod.

yeah this was fixed.

alright thank you