Hi,
So, when you drop a troop in the middle of a building you will see this message:
You cannot deploy troops on the red area!
and the base gets surrounded by red lines.
My idea is: When you try deploying spells on the storages, you will be prevented and get a message:
You cannot deploy spells on storages!
and maybe storages will be surrounded by blue lines, for example.
This won't prevent the storages shield in case a lightning spell strike touches a storage.

