Hey! For once, someone linked to my thread! If you don't find what you are looking for, here is what to make:
Jungle, Plains, Desert, Medium Biomes (Native Biome Controller makes biomes spawn like the overworld), No Weather, Standard Lighting, Noon, Zero Length, Normal Sun, Full Length, Normal Moon, Normal stars, Standard Terrain Generation, Clear Modifers (If you have it). There you go! Zero Percent Instability!