I can agree with everything you say...except for one little qualification:
At least, to some degree, success requires that the RNC and RSCC not screw it up -- fighting the Tea Party with more money and passion than they direct against the Democrats.
Given that we'll be expending serious money and passion against McConnell, Graham, Alexander and Cochrane, e.g., I rather doubt we can count on their support for our candidates...should we prevail.
Nonetheless, the internecine battle in the Republican Party needs to be fought -- and both sides need to abide by the outcome if we are to succeed.
#defundthegop. Stop contributing to the RNSC. Try FreedomWorks or the Senate Conservative Committee.