You can also place your bow, magic, and healing units on them after they are secured. However, you need to take down character units such as Catherine, Ashe, Gilbert, and Cyril to secure a healing tile.
Healing tiles are very essential to sustaining the health of your initiating melee units. Information on Terrain 3) Place Lower Health Units on Healing Tiles Fliers are not affected but use them to break down blocked tiles for your other units to be placed on. While moving throughout the battlefield, avoid placing your ground-based units on bonfire tiles.
Information on Classes 2) Avoid Placing Units on Bonfire Tiles Except for Fliers Put your flier and mounted melee units on the frontlines while you move forward. It will take time for the enemy ground units from the left flank to catch up on you. Move all of your units to that area and group them together. However, the right flank is less of a challenge for your allies, with the exception of the bonfire tiles. The whole battlefield is covered with enemy ground-based units and golems. The Fight for Fhirdiad Strategy 1) Start your Siege at the Right Flank