Those are good alternatives, better than single-state nullification if they come to fruition. But, IMO, you don’t need a constitutional amendment to allow states to reject unconstitutional federal acts. It is supported by the Supremacy Clause and the Ninth and Tenth Amendments and nowhere is it expressly prohibited. Arizona already has such a law on the books, that it reserves the right to reject any federal law Arizona deems unconstitutional.
In the meantime, single-state nullification of unconstitutional federal acts is better than nothing and can restrain illegal federal encroachment immediately.
The framers did not consider state nullification out of the question. I love Madison, but he went back and forth on certain issues. Don’t know why he would be against it and if he was I don’t know if he wavered. I’d be interested to see he relevant comments. And don’t know why you’re against it.
If single states can nullify, there is little point to congress.
The de jure remedy is an amendment to empower the parties to the constitution, say 3/5 of the states, to repeal congressional, executive, judicial acts.
I acknowledge that Obama and his rats illegally nullify/amend the constitution on a regular basis, and we being pushed to our limits. My hope is for peaceful resolution via Article V.