Spawning Omnd Omnd Ohk isn't actually that hard. Tedious, sure, but not hard. Head to Low Gut Rut, and kill savages, warriors and gunslingers until the badasses arrive. As long as there's at least one witchdoctor, they'll (generally) start to evolve the badass savages. Damaging them can help a little. Sometimes, the witchdoctors will stop upgrading, either because they're lazy, or they insist on making tornados instead. Just quit and take another crack.