R2API.Stages is a submodule for R2API that adds a single unified method to register both new stages and variants of stages.
R2API.Stages also hosts an abundant amount of utils to assist in stage making.
You can use StageRegistration.RegisterSceneDef quickly register a SceneDef to its proper place in a loop (Stages 1-5). This method can add both variants and new custom stages. To add a variant, make sure the baseSceneNameOverride in your SceneDef is set to the same string as the stage you want to make a variant of. The method will automatically adjust the weights of any variants you add so each locale (ie: Titanic Plains, Distant Roost, and Siphoned Forest) has an equal probability. You can also add variants to modded stages.
The StageRegistration class also hosts stageVariantDictionary, which is a readonly dictionary to grab all the variants of a stage by inputting the baseSceneNameOverride. For example, if you input "golemplains" you will get a list of SceneDefs with atleast golemplains and golemplains2.