If you are using mysql only for backup... You could do this based on what I do.
Have your main super stable server running anope, setup a rsync task to run every hour to rsync the .db files to the backup/secondary server with a copy of anope ready to roll.
You could even change how often it runs to like 10 minutes if you're super serious about recent backups.
So if your main server dies, your backup can just be started np.