grammar - How to pied-pipe "only in respect to which ... by ... rule"?

I'm trying to pied-pipe the last dependent clause for simplicity, following Prof Lawler's comment:

...but not to legislative facts that will produce adverse consequences to them [//]
only in respect to which[,] they are members of a class adversely affected by the legislative rule.

Please advise on, correct, or improve my attempt? Please show all steps and thought processes.

Abbreviate legislative facts ... to them by *.
Then the present clause becomes:

1. but not to *, only in respect to which[,] they are members of a class adversely affected by the legislative rule


2. = but not to *, which they are members of a class adversely affected by the legislative rule only in respect to.


3. = but not, they are members of a class adversely affected by the legislative rule only in respect to *.

He later remarked:

Pied piping doesn't affect adverbs, so switching around only is on your own hook. Only has a focus and has its own rules about where it may appear (basically right before the focus word, or right before a constituent containing the focus word)...