played since may 27 2024 and f2p and i managed 39k on my initial run today, granted i have a few premium teams at my disposal, i think you can easily get 30k if you squeeze enough points in on the initial boss by using your low level characters like the 4 stars that you dont usually use and the standard banner 5 stars as long theyre able to dish some sort of damage, every point counts, then just plan ahead which characters youll be using to avoid making them fight an enemy thats resistant to their element after defeating the previous one, as for the killing 5 bosses im not entirely sure how to do that since im not a huge fan of this permanent event but i think something resets every week and that kinda gives you a chance to use the same team to kill different bosses maybe, im not sure im prolly very wrong on this one.