Board Thread:Theories and Speculation/@comment-33485854-20180625233306/@comment-6769189-20180626000731

SPSM is not Sage Mode + 6 Paths chakra. Madara had 6 Paths chakra but didnt activate SPSM after stealing Hashiramas senjutsu.

6 Paths chakra only gives Rinnegan to Indra's line because they inherited the eye powers.

6 Paths chakra gives Ashuras line even stronger bodies/life force.