Would that be sufficient
No.
3-2-1
Three copies; your working copy, and a cloud copy, and (as an example) on and external HD that you keep at a friend’s house….
On two separate media… so yes cloud can cover that
One off site. So yeah cloud covers that.
Encryption on your off site copies. Yeah I don’t care if they are Linux ISOs or your grandmas recipes. ENCRYPTED
Thanks for coming to my TED talk
Agreed… Yes, and… specific to backups all the encryption….
Your production stuff, yes should be as well