Guild Friendly Battles

I'm not sure if CG has mentioned or talked about plans for this before, but it would be great having the ability to have players in the same guild be able to friendly GAC mock battles against each other. They could go straight into the attack phase and then after an hour or however long the results would be tallied up and they can see how they did, that way guild members could test what works and what doesn't in a way that wont affect their rankings. That or have a way to fight another member of the guilds current arena squad so they can do friendly battles that way