Or should I go 11 > 12 > 13?
Edit: Thanks for all the replies. I asked this out of laziness and apparently trying this is not a lazy thing to do. I’m not Bilbo Baggins seeking an adventure. Will go with 11 > 12 > 13 way, though might stay at 12 for a while at this point. You know, lazy. :)
11-12 should be well tested. 12-13 should be well tested. 11-13 may work, but you may be the tester.
I’d step through one at a time.