Yes, spot blue is about as good as you can do .....
I find that quality steel rings, should not need alignment or at least I don't go in, assuming that they will be off. I always do preliminary checks to determine the need, I go for a high percentage of contact and if it's not 100%, so be it. ...
The most common problem I run into, is a ring or ridge on the outside edges of the rings bores. These ridges can really bite into your scope. I just champher them down to the internal plain.
Be Safe !!!