Originally Posted by LordYinYang
Partially correct; Naruto's tutelage is based from the Toads ascetics focus on Senpō: Ryōsei no Jutsu ('Sage Art: Amphibian Technique') to bypass the weakness of Sage Mode. However, Naruto bypass this weakness by using Kage Bunshin's. In principle, the Toad's Sage Mode essentially requires a partner to circumvent the faults of weakness, which is moving while collecting natural energy. Sasuke on the other hand, has been set-up to adjust to no partner by mastering the effects of the Curse Seal and presumably attaining Jūgo’s flesh—which absorbs natural energy passively or by itself.
Originally Posted by iSpeak the Truth
No, I am assuming that if Sasuke needed a chakra boost, Masashi can take this route to introduce it. Evidently, the only viable claim that can be currently suggested that Sasuke will be using Senjutsu, is Sasuke's altered chakra pool and Jūgo’s flesh—which absorbs natural energy passively or by itself. Note that Sasuke did not display a heighten effect of psychosis until after the assimilation of Jūgo’s untreated enzyme.
Originally Posted by rollin
Not necessarily, I was establishing that Sasuke before receiving the Curse Seal, already possessed an unsual amount of chakra. Since then, every time Sasuke used the Curse Seal he was using Senjutsu, and the effects of it consequently allowed Sasuke's chakra pool to increase: every time. What's more, Sasuke would eventually mastered the Curse Seal, which would amount to him mastering Sage Mode through the Curse Seal. However, Sasuke no longer has the Curse Seal, but his chakra pool does in fact retain the changes it had from under the influence of the Curse Seal. In addition, he seemingly possesses the ability to inactively absorb natural energy because of Jūgo’s genetic material—which could be seen as a higher implementation of the Curse Seal.
You could say that since Sasuke's chakra retains the effects it had under the Curse Seal, that the natural energy from the integration of Jūgo’s flesh would involuntarily create Senjutsu chakra, and these chakra would be use for Sasuke's Eien no Mangekyō Sharingan.