Before I had finished the DS clones, I spent a raid weekend whilst travelling trying to maximise my scores with my bit-part teams, after I’d submitted good scores with nuBB, KB, Jocasta +1 etc.
I could remod Sana, Hondo, Nest and 2 other crappy toons (JC and IGD I think) to get 450k relatively easily.
With nothing else to do whilst travelling, I remodded the remaining Jedi and tried for longer than is healthy to max the 600k tier. I am confident that this cannot be done, no matter what mods or strategy you use. I dropped to the 450k tier and eventually did get max score. I have never attempted to do that since.
So I agree with OP: Max score is not possible beyond the 450k tier with the “spare” Jedi.
I may not the best swgoh player in the world - but I know how the raid works and I know that I can mod 5 characters as well as anyone who plays the game.
If we’re putting quotes around things, “players who haven’t engaged with end-game content should be cautious about implying those who have don’t know what they’re talking about”.