Well, the pairing of MC and IC does double duty.
Having said that, I would say no. Seven story forms would be self-sabotage. It is insanely difficult to create a story with just 1 or 2 story forms. I think any more than this would be... madness.
Maybe it would work as a 7 book series with different MCs, but as a single story -- that would be overkill. A Rashomon effect might be interesting if the character's weren't together for the majority of the novels.
On a scenic level, I like to develop opposing PRCOs, emotional states, stakes, etc. But, it doesn't have to be limited by a story form.
Be a pragmatist when writing. Otherwise, you risk being a theorist of Dramatica or a story former rather than a writer. Both of those things are fine if that is what you want to be. But, you want to write. So write with one story form and fill in the blanks with your imagination.
Just my advice.