The overall difficulty of the second level of Mirage is relatively simple. The Overlord will give the villagers a buff that increases damage every round. It is recommended to focus fire on the Overlord, and then slowly clean up the remaining mobs.
Note: If the enemy healing unit resists the control skills, you can ask the Dragon Palace in the team to target the AOE skills on the enemy's fallen target. Since the Dragon Palace usually attacks slowly, the enemy healing unit will be resurrected in time. For some enemy targets, Dragon Palace can also take final action to harvest the remaining blood.