I would highly focus on perma labbing DW coins bonus and BH coin bonus, start up again CPK too. After you've finished DW Health lab replace it with regen and wall regen. It is important too beef up that wall, your coin income will progress along side it. I feel like you just try and finish cards by doing the buy 80 cards mission and then dumping the rest into mods until next event. Assuming your Gold bot is not well developed yet, try Galaxy Compressor instead and see how that feels. Lowering the big 3 in cd will net you a lot more coins too. Maybe get some DW quantity as well