if the ruckmen are just throwing themselves straight at sandi to try to neutralise his height, maybe he could sidestep and just use his reach to fist the ball to advantage? The only reason people are winning taps against him is because they are just pushing him out, if he sidesteps and they end up too far under the ball, the tap out would be easier. probably hard to do, but could be used to stop the dirty tactics that are deemed allowable (against sandi) by the umpires.