Keep playing, one day everyone will have 8 x 27 gold troops, without sweat. Anyone want to have better army, stronger power than the rest (casual players), (spending) money is the way.
(After reading this) You may say "What ? it does not help, all I want is do this do that and boom = super power". Well, if you played in some very first servers, like 500 - 600 days ago, doing above advises (if you do not know anything) may give you one extra gold troop, but if you just played 30 - 100 days recently, those works may give like 1-5 gold soldiers, a little help, because you never have enough heroes, attribute cards, high level weapons, etc., then keep playing or spending money is the only way, do not expect there are the ways to be stronger than other "free of charge" (if such way existed, Lilith already close it).