I would accept any and all measures you just proposed, and thou I might agree with your prioritization of their resistances I also believe we must take whatever of them we can get.
In general however I don’t believe the 17th Amendment is more important than a nullification process which should require not more than 1/3rd of the states in veto of a edit.
The laws of a Constitution of limited Government are by nature designed to protect the minority.
The truth is we don’t need the Federal court system involved in any intrastate domestic matter period just like we don’t need or authorize congress in such matters.
We the people have labored to create State Constitutions and elect State and Local governments for this matter. The Time, attention, and resources of congress should be focused upon foreign matters which have been sadly in Gross neglect.
I don ‘t have any problem with what you propose. I think repeal of the 17th is doable in the short term. Nullification is a longer term issue. The people have to be readied for it. As far as the federal courts are concerned I would eliminate judical review. That would fix the problem with them in short order.