Haha, I love reading through these challenge threads! Good luck I look forward to reading your progress!

EDIT: Where it is true, Enemy Skill does kick some ass, it also requires some serious effort to get the good ones. He'll have to get to at least level 20 and then have some good luck to get Beta. That should make the next 1/3 of the game pretty simple. Things will get interesting again by end-game. Especially because, by following this challenge you cannot get White Wind, White Wind requires use of the Control Materia which in a No Materia challenge you are not allowed to use.

Good luck