Ring and pinion, or spider gear issues?

Definately do your best to not land on the throttle. Brushless has a lot of torque and it is hard for the diff to stand up to an on throttle landing.

If your ring and pinion gears are stripping, try shimming them if you arent.

Loosening the slipper would definately help, but then if you get it too loose you have lost your acceleration and wheelies and will be burning slipper pads.