In my opinion, most or even all trditional Catholic men discerning the priesthood should become diocesan priests. They would work up through the hierarchy and renew the Church to her beauty. Restore the Church through the diocesan structure just as the Modernists did from the inside.
Lad, this is an errent view, and I will tell you why, if one joins the diocese he must obey his Bishop, while his Bishop MAY allow him based on the Motu Propio to say the Latin mass, he will order him to say the Novus Ordo on Sunday Masses. Saying the Novus Ordo is a sin, because you are legitimizing it to the flock. One cannot say an illicit mass and then condemn it, which is why the great Archbishop Lefebre refused to ever say it. He was offered a deal long ago in which they would allow the SSPX to go on and leave him and his order alone if he would say ONE Novus Ordo Mass in public. He refused.
So I would have a different view then you. The SSPX will attempt to convert the Concillarists, and that is how we will end the crisis. St. Athanasius did not join the diocesans to save the church, he actively fought against them from outside, and that which is evil will wither and die, and that which is good will prosper, St. Athanasius prevailed by not backing down in any form. And the Arians were declared anethama.