Ah, the Class S test... I had to redo that not too long ago, and I'd completely forgotten what a pain it is.
There's not much to say about it, though, as it effectively amounts to "Do you know how to use the Lifter and how to not get screwed by two Golbesh standing next to each other?" Other than that, it's just a matter of persistence. Props for the no-damage clear, though.