The judicial norms breaking is leading nowhere good. But unilateral norms breaking seems bad too. So here is my proposal if the Republicans nominate and approve a Justice to replace RBG and Democrats get a trifecta.
First off, do the maximum judicial stuff. Add 100 seats to the Supreme Court. Strip the lower courts of power, replace them with a different system, and fill that with liberal judges. The whole 9 yards.
While this is happening, propose an amendment to the Constitution. Many states have commissions or other means of making judicial appointments fair. Pick the best one and adopt it. It also fires all judges except for cases they are working on. If Republicans want a cease fire, they can pass the amendment, if not at least there will be a liberal court for a while.
Anyway, wash your hands right now.