RMAN without a repository and a total site loss

I am using RMAN without the repository. I want to plan in case we have a total 
site loss and all I have left are my tape backups which are all compressed 
backupsets. 

So my control files with my catalog are gone. What do you recommend as the best 
way to recover if this happens? Should I backup my control files seperately on 
top of the backupset? Should I do backup controlfile to trace?

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