The fact that you can change disks on your toons for arena and coliseum without starting a cooldown period is being exploited for extra points and support doesn’t care. We have been complaining about this for a while.
What people are doing is coordinating attacks with their friends, they are removing disks briefly on their toons(making the line quick killable), letting friends hit them for extra points, and then quickly adding the disks back. This all can be done in a few seconds and it has killed spirits on server one.
Please implement a cooldown period when making any change to your toons for arena and coliseum.