Golden tip***: If you have more than 5 strong heroes, bring your spares the first few battle of crucible where it is easiler to win. Make and keep their power bar full. Should your main team lose, you can bring in your weaker units that have skills ready to be activated to blast at your opponent straight away! This strategy always allow me to clear a couple of stages more. Imagine you have 10 heroes and 5 spare heroes with power max, ready to blast when sent in
Further explanation, for example you have a main team (take it as all level 40) of