If you want to recruit high-level heroes you can try to exchange them directly by acquiring shards. Shard acquisition can be obtained by playing copies and guardian castle battles. The main purpose of the copy is to get fire, and the fragments are rarely random. So the fragments are mainly obtained by guarding castle battles, the more advanced the castle guarding battles, the more fragments are obtained. If you want to improve the win rate, then you have to strengthen the defense pendulum and play first to have a sure level. You will get one castle guardian battle every two hours, so budget almost the most chances to set up and start the battle. Do not waste the opportunity oh. In addition fragments can also be obtained through the title, which also has to get very advanced later to have hope. Through the gems for heroes risk is too big, the more to the end you will find yourself wanting almost difficult to get, perhaps you can save to buy gold or potions. The more you get to the back, the more potions and gold needed to upgrade especially, in order not to waste time to grab, soldiers need to practice for more than half an hour, in order to prevent being stolen and have to wait half an hour, waiting time consumption is very big. You can buy gold or potions with gems when you are almost close to the upgrades required. Upgrade the quality of heroes can be done by improving the level (need to fire, honor, gold), which honor the more to the later the higher the demand, basically to the level 80 after, it is recommended to selectively improve the hero, first upgrade such as druid, thunder god these two. In addition, the quality of heroes can be more applicable skills by choosing to enhance skills, each upgrade or conversion to spend 300 gems, especially the conversion pit quite powerful, it is recommended that more gems to use up and then test the conversion skills random.