Here are some tips for playing: Prioritize your gems on maxing out your battalions. Then, get the weekly gem daily for the guaranteed hero. Spend your gold evenly across your ranged and melee units, and your heroes too. You have to leave your phone on to get new units. You'll eventually stop using commom units. Use them as fodder to craft new relics in the relic tab. Some relics are situational and shouldn't always be used.