Assault Battle Cadence

How you came to conclusion that pissing people off will make you more money?

You try too hard to milk this cow and you will kill it very soon. 

You could simply add new assault battles to assist lvl 9 and 10 without changing anything for low relic.

It takes months, sometimes years, to grind team for AB, just to  learn that this team is no longer relevant. There is similar mechanic for raids so you end up grinding irrelevant teams so they can be relevant for few months.