Board Thread:Help Board/@comment-31.178.203.180-20150927083345/@comment-27038018-20151002140819

The best way to level up your units is to Get Max cost for all 5 stars, once you have enough extra evolve one 6 star, repeat this until you have room for all 6 stars. Repeat process for 7 stars. If you evolve all your units before you have room for them you will truly limit yourself on what you have available to you for your squad. Also dropping a unit to fit another 7 stars is typically not recommended.