All of the 'core' FfH modmods (Fall Further, Orbis, Rise from Erebus, Wild Mana, in order of age... and alphabet as well? Odd. ) are standalone downloads; You do not need any other mod or modmod to run them. You can download and install Rise from Erebus without FF, or even without FfH; Again, standalone. I won't say it's better to get RifE (RifE, not RfE ) than FF, but as it originated as an FF modmod, we contain most (not quite all, anymore) features of FF, and are actively developing, while FF is on hiatus.