Oi, this seems interesting.
I though none FC would be fitting enough for me beside The Akatsuki FC, but I would like to join this one as well ^^
If there is a place for a co-owner, I would possibly like to be one (based on what my job would be, since I am quite lazy ).
Now, as for your questions, I will answer them the best I can:
-A genius is someone who has a natural talent for simply being a shinobi, and can overcome shinobi obstacles with greater ease. A genius has to be quite intelligent, and would need the ability to learn much faster than an average shinobi. A prodigy, in other words.
-I would suggest putting Sasori on the list. If Kimimaro is there, then Sasori definitely deserves getting on the list as well. He is a person who completely dedicated himself to becoming what shinobi was said to be - a perfect weapon. Sasori already toyed with his parents in his early age. He took out the strongest Kazekage in history of Sunagakure. He had Kabuto as his minion.
Nothing else comes to my mind at this moment of what should I write,so meh