Board Thread:Theories and Speculation/@comment-35023081-20190916124836/@comment-43776375-20190916130842

Well he use it even when he got the rinnegan in the battle aganist the 5 kage, like a user said in a post I made, madara had to go back to the EMS to do a genjutsu on the kage, so madara hasn't the power of the MS in his rinnegan

And itachi should have used it in base sharingan

Shisui uses it with one eye (but it's only a game thing I think)

We could say that if you are skilled enough after learning how to do susanoo with the MS you can also replicate what the MS does, like observing how your chakra is manipuleted when you inject it in the MS to cast susanoo and then replicate that on your own

I mean it's a jutsu that all the uchiha have when the get the MS so it must not depend on the diversity of the MS which differentiates from one another by another shape and special ability, the MS let the user cast more powerful genjutsu, and you can use that to learn to cast better genjutsu also in your base form (I guess?)

So experience?