I hope fairies never move out of red zones. They take very little area damage and I want to stay put wherever I place them. If I want them out I simply using Heel or replace them. On single target damage sure they take a lot of damage, but I believe they are supposed to. In this case I would just use Heel again.

As for switching fairies mid-battle there is really no good situation for this so it is not really needed. Out of battle you will have time to summon the other fairy as you check loot. Everything else I agree with especially the macro bits.