the only reasonable point you made was the point about her dying in the pit. that's the only thing that would have happened if bane wasn't around. but that alone doesn't mean that she wasn't the mastermind. and if anything it highlights bane as the guard dog once again, not as a master mind. you can't say with 100% certainty that bane was responsible for them forming up because that wasn't addressed after talia was revealed. the only nolan addressed after revealing her was that it was actually talia who escaped the pit the same way bruce did. nothing else was discovered or cleared up. bane was the physical aspect but talia was the brain for sure. they were both necessary in the end but it think talia's role was the most critical...
Yes, he was. the film flat out said Ra didn't accept Bane into the League of Shadows because he felt Bane was too extreme, even for him. That was Talia's exact words. I wish I could find the script. Without him around, she would've presumably stayed with his father.
The other shyt you typed You can have all the ideas in the world. With nobody to execute them, they're just ideas. Phil Jackson can be the greatest coach to ever lived. Without Michael Jordan or Kobe Bryant, he's just a scrawny fakkit with a clipboard.