@SnapdragonQ, I'm poking around on this site, and she has a lot of info on various GF flours and how they work and what they're good for. She doesn't like the brand of flour I can get (reasonably) cheaply at Costco, Namaste, and says it won't work in her recipes. Like a bagel recipe...
https://glutenfreeonashoestring.com/all-purpose-gluten-free-flour-recipes/
Yeah, I'm familiar with her. Along with quite a few online people who insist only their blends will work for recipes X, Y, or Z.
Take it with a grain of salt.
See where she splits things down into the 60% /40% ratio I mentioned? I would use that as a good start for a ratio. The problem with purchased blends like Namaste, or Bob's Red Mill, is you don't exactly know what those ratios are. And the ones formulated for things like pancakes or muffins tend to be far more starchy and will not work for anything with yeasts.
It would probably be very easy to take Namaste and add some of your own whole grains to make a mixture with the proteins and oomph to make a yeasted item, or bagels.
For example, I like Bob's Red Mill GF 1:1 because it's made in a dedicated factory safe for kiddo. (all their GF stuff is) But, it has it's limitations.
In one of my best home constructed bread recipes yet, I converted a recipe that called for 3 cups plus 3 tablespoons of the author's super special flour mix X and split it up like this:
2 cups + 3 TBSP Bob's 1:1
1 cup GF wholegrain mix (quinoa, amaranth, flax, buckwheat)
The remainder of the recipe exactly the same.
Guuuurl... that bread nearly brought tears to my eyes! Almost as domed as a gluteny bread, perfect texture, terrific crumb, and so satisfying I nearly wet my pants. It is now our go to everyday bread. (smack yer momma good if'n y'all be from the south!)
I have learned that yes, mostly starchy mixes may be fine for cookies, but are terrible for anything with substance. Those books we talked about in the PM cover some of this and is what set me to be able to experiment with confidence and create my own recipes now that I understand how things work.
Let me do some digging on Namaste's ingredients, and I can send you some Bagel and Pretzels that might work, if you want. I know my page pictures are not the greatest.