No matter what the nose up trim goes to we were trained to roll instead of stall. No airline trained us that but somewhere in my background I knew if I had runaway trim just bank until the nose is where you want it. 90 degrees is fine to get started. Then pitch and roll to what ever with reduced power makes a flyable airplane again. Once stabilized set flaps so it can be landed. Full up trim isn't a problem. It seemed reasonable to me. Banking requires more back pressure so let it help you.