Tenacity Down can't be resisted, both Chewie and CLS apply it, so you shouldn't count tm gain for that. Tenacity down won't help the other debuffs with Padme, but that teams increased tenacity is only with protection up. So it's going to come down to the assists vs. damage as to whether that's lost. If CLS puts buff immunity on before they gain protection up, then that person is not resisting. In any case, if you think they are not losing protection up due to the assists, then your best hope is a time out, just like if you ran this team against a lone Nest. This is WAI and makes Rebels a bad choice for Padme.
As for p3 Traya, you're probably looking at the second topple before she resists that much, and hopefully your team all survived until then, but you had better have putbin a burner team to eat isolate. But even so, Anakin + Nightsisters can solo p3 due to tm loop, and now SLKR can solo the whole raid because why not, so I doubt the devs care much at this point.
But in either case, nevermind this manufactured situation you have where the whole team starts at 100% tm. You can certainly have them all go first on this team due to the initial tm gain from Han's opener--this is how CLS teams beat Revan--but they don't all end up at 100% after that. Remember that Padme needs the protection up before they can resist, and that's not going to happen until at least the first assist. So yeah, maybe without crits they can't override the protection up (60% from the two assists less Chewie's bonus damage), but Han's initial expose went through (so actually down to 40% protection up now), and tenacity down still should go through, so that's 10% tm down from your calculations.
