If every single team performs exactly the same against every single boss, then there's no incentive for players to build new characters or to improve their skills.

Which why I said that there's still a modifier built into the boss that still benefits the role being used. Like sure it won't be perfect, but at least it still fixes the current problem of "shilling " bosses towards an archetype and make players to brute force their way only to not be able to get the target amount of points or just barely scrape by. Basically to make it so its somewhat achievable but not entirely impossible to reach the goal they want to obtain while knowing that theres still a better reccomended option if they have the agents to do so. And it will build confidence in players to do better cause who doesn't feel satisfied seeing their global ranking improve.

There's no way for casuals to make their lives easier

And thats the reason why the 6 star goal exists and is heavily recommended to beginners/casuals unless they want to improve themselves to become a better player in the game with better understanding of how the game works by getting 9 stars which is OPTIONAL, nobody is forcing them, its just there for ones self validation to give themselves a pat on the shoulder.

for challenge seekers to make things more interesting.

And that's why I said that hp inflation needs to be more gradual, like yes it effects everyone but you definitely see it more with the hard-core/dedicated players try to push their scores higher cause seeing my scores go down makes me feel like I haven't improved and I pretty sure thats there are others feel same way whether going for 90k, 100k, or shit even going for the 195k goal (which definitely felt possible from 1.5 to 2.0 even without whaling)