Board Thread:Naruto Discussions/@comment-25374031-20140917212238/@comment-3568954-20140925081435

Hiyayaka-kun wrote: Fukusaku and Shima also stated that you cannot collect senki/shizenki (nature energy) while moving, and that at best you could only last 5 minutes with the collected energy. Having the two of them there allowed Jiraiya to fight indefinitely as a sage while they could collect energy. Furthermore, he was able to use combined techniques with them as well as cover his weaknesses such as genjutsu. Call it incomplete if you will, but its certainly not inferior. Jiraiya was a boss and quite possibly the closest thing to a full sage like Hashirama/Naruto that ever was in that era.

it is Shizen enerugī not enki/shizenki also they said he could only maintain it for 5 min because of how much mastery he had over it at that moment. as in he could not bring in enough chakra. and yes his sage mode was inferior because the definition of inferior is lower in rank, status, or quality. and it is a fact that Naruto's sage mode before six paths senjutsu was superior