The issue is that you should not confuse the strength of resisting the combined force between the Spirit Bomb + the power of the user who launches it, with the power of the Spirit Bomb itself.It’s said Kefla rivals the power of the Genki-Dama Goku bathed in. Wouldn’t that mean SSJ Kefla ~ Goku SSJB Kaioken x20 (Genkidama)?