I thought his nindo was to get power on his own... Which is odd because his power comes from three different sensei's.(Hatake,Orochimaru & Godtachi) Hogo not sensei to him but his power comes from the sage aswell..
He didn't follow Indra's way an create jutsu of his own gain power through hard training himself.. (Kishi slipped on Sasuke/Indra similarities)
While Naruto/Ashura similarities was there, Workin with others.
(Indra/Ashura Naruto/Sasuke thang was probably spur the moment thing that they kept goin with)