I never tried Blu, never heard of Vanda...but given that list of vanillas you are working with, I wonder if you've tried the 3 different vanillas by FlavourArt. Since you are 'LoveVanilla' I say your collection is incomplete without them

I also have all the ones you list and use Sweet Cream, Vanillin, and Vanilla Swirl quite a bit.
I'm with coffee like you are with vanilla. Maybe you have enough vanillas to try what I did. I got a tiny bottle and put in one drop of every coffee-ish flavor I like the most. I had 30 drops. I added an equal amount of nic base to thin it a bit, set it in a cup of warm water, shook well. I labelled that bottle "coffeeish flavoring" and used it as a custom flavoring. If you don't work with tiny samples, you could use 2 or more drops of every flavor. Anyway, it was surprisingly good, very complex, totally vape-able.