It might help others more to also say at what power you do what damage.

Someone might be able to kill the cat in extreme, but maybe that's cause that person might have 70k+ power and not because of a certain setup.

Earlier I used Anko-Hidan-Tobi team (Anko barrier- poison-ignition chase). At around 52k bp can get around 280k coins.
Tried replacing Anko with mei and the dmg output is more or less same.
Tried using nine tail team before, but it always ended up doing less dmg than the highest I can reach.

Try to post how much coin you get at what power with which setup, that should make it more clear.