I'm sorry, but playing 2-3 zone is asking for it :)
I'm afraid you're wrong. If you have idiot that fouls out, no tactic will help and even 20 defense won't help. That's just the way it is. I had 2 players like that. I got rid of the first trainee after 2 seasons of training and I got rid of the second trainee after season and a half when he fouled out in 2 games in the same training week.
If you don't believe us, buy a trainee that fouls out and try to train him. I bet you'd fail and he'd keep fouling out. Let's face it, he's an idiot :)))