Couldn't agree more, a primer on traditional Indian attars, such as Majmua and Jannat ul Firdous (which is what I was kinda envisioning in my head) would perfect (and I believe something you've mentioned in the past)! Even something with rough fractions would be a wonderful starting point. Of course with different price brackets being targeted maybe the ratios themselves would be basically useless.
I'm hoping for the best, but I know the best I can hope for, is something that won't smell terrible. That being said I did try to approach this in a similar manner to how I combine oils on my arms. Sandal and Ruh Khus work in an almost magical way together, but with even a light, full swipe of Ruh Khus and a heavy swipe of Sandal, something feels out of place. Instead, dots of Ruh Khus alongside a fat swipe of Sandal work the best for me, so I used that as an outline. Let's say 1:5 Ruh Khus to Sandalwood, and even might be pushing it.
Wanting to highlight the Boswellia Serrata, I chose some 2020 Ruh Khus from An Najwa, feeling this was a slight bit fuller and refined than the 2021. For Sandalwood oils I used Habzoud's Fawz and mesOud's NTT. At this stage, even thought the primary note I was getting was the Frankincense I could already sense the Ruh Khus and Sandal, "filling out" the original scent, somehow making it denser, more tenacious without sacrificing the minty top I wanted!
The choice of materials was very much, what smells like it could complement the Frankincense. Sandalwood Ambergris had an airiness which I hoped would add to the top and further fill out the base. Cedars I used were Atlas and Himalayan varieties, again to add to the pine-yness but for some sweetness as well. I chose the oakmoss feeling something was messing, I wanted a heavier resin feel to the blend. Initially thought of Patchouli but then settling on the Oakmoss Absolute, because there's something in it which feels like full perfume, but again using the tiniest of tiny amounts.
Might make a Sandalwood and Oakmoss blend next, again I think both notes would complement each other.