I'm not sure enough is known about what he did for us to adequately judge it's use, the ease to perform, or the time requiredNo, i m talking creation of all things rikudo used. Using dark and light energy he created bijuus and juubi jinchuuriki madara has access to those abilities as per databook after becoming juubi jinchuuriki.
Also just because he is able doesn't mean he either knows how (although there did appear to be some form of 'instant gained knowledge' thing going on in Naruto if I recall correctly)
And the bijuu aren't really like people anyway - they are beings of pure energy...
In response to your idea, I honestly have no clue
Even so, I'm still not sure how Madara would survive a fight between two Tetsuo's - even if he does jump into the limbo dimension (which is of course allowed), I dunno how he could return/what state the world would be in if/when he did
Not sure we can count Tetsuo being stuck in a fight with himself and Madara being stuck in the limbo dimension much of a win for Madara
That certainly sounds like it would take too long to be of use in this fightAnd madara made hashirama clone implanting his DNA using mazou which grew after his death and was shown to kabuto by obito.
I'm not a fan of those wiki's in generalThen wikia is wrong. They also didn't have sources mentioned is why i asked.