Timestamps for this video:
Battle 1 Strategy - 1:00
Battle 1 Begins - 3:50
Battle 2 Strategy - 13:10
Battle 2 Begins - 18:05
My observations about the Restore(+) staff:
1. Restore is prioritized over attacking. An attack that resutls in a KO is probably prioritized over Restore, but I do not have experience with this situation.
2. If the enemy AI is not yet aggressive, and the enemy phase begins with one of your units in range of a Restore staff unit, and that unit goes off to use Restore, the AI WILL become aggressive.
3. If the enemy AI is not yet aggressive, and a Restore healer ends in a spot where it can target one of your units, the AI MIGHT become aggressive:
3a. If the healer is not refreshed, then the AI WILL NOT become aggressive.
3b. If the healer is refreshed, and there is another enemy that can be Restored, then it will Restore that ally, and the AI WILL NOT become aggressive.
3c. If the healer is refreshed, and there are no other enemies that can be Restored, then the healer will attack, and the AI WILL become aggressive.