Basically Just collect coins and donate to the group; Always spend the 100k coins for the 5 frag at black market no matter how crappy they are. Maxing out all of my 53 ninjas on level/cultivation/awakening(No matter how crappy they are cause my OCD needs to see all gold. Wouldn't recommend this to anyone, save everything for late game ninjas, this is my personal choice and * one at that)

And participate in all the daily events mainly for the coins(once again to help put 290 daily into the group), and for anything free from placing top 3; Mags, Scrolls, Refines.

Really all there is to do once you've hit cap.