If I had to do it myself from my ignorant savant point of view: I'd want a 3-2-1 sort of thing on my profile. (3 backups, 2 mediums and 1 remote location.)

To validate my key today in a sovereign way, I have nip-05. Gimme 2 more ways, one in a different medium and one in a remote location.

Which.. I could have: a secondary nip-05 different locations, check. The one outside the internet is harder to parse automagically. Unless of course I could gather my homies around a 40, a blunt and have them unfollow my old key and follow my new one. Different medium, check.

Likely all of the above has been tested and disproved, but who knows?