it's not difficult to get good at a game like this. Events every Friday are quite generous with rewards and if we had infinite energy to do missions we would have the best cards in a matter of minutes. Never payed once and I have a full deck of epic t2 (middle level fusion) cards. Gold isn't difficult from events like brawls, even if you are losing every battle cause you still get 50 precious gold. If you win it's 150. Sounds pretty balanced although war bonds for what they are are expensive