Myself I teach the crab on final and transitioning to the sideslip when approaching the runway (just before flaring).
Never tried a one-wheel touch and go myself, though it sounds interesting.
In regards to touchdown, I don't understand (like many others) why touching down with one wheel first would overstress anything at all.
Remember, if your airplane is "airborn" enough to touch down with just one wheel, and especially stay at one wheel, then it is still creating tons of lift, and there is basically no weight on the wheels anyway??