This is a follow up to Thirsty Viking's post. Yes, I've tried Chuck Wettergreen's capsimels, and they are quite good, although the heat level is high. It's not the kind of thing for anyone but a dedicated chile-head.
Chuck has written several good posts on the use of honey blends, and buckwheat honey. Try clicking on his profile, then looking up his posts from there.
A few other points -- buckwheat honey varies according to what region it came from. I believe buckwheat honey from the west coast is lighter and milder in flavor, compared to east coast buckwheat honey, which can approach the strength and flavor of molasses.
The fermentation characteristics of buckwheat honey have been known since the 1950's, primarily through the research of the late Dr. Roger Morse of Cornell University. Morse found that buckwheat honey fermented quite well, better than any other honey, and generally did not need nutrients at all. The lighter honeys showed more difficulty and needed extra nutrients. To the best of my knowledge, Morse never worked with honey blends, or tried combining buckwheat honey with other honeys. There was nothing of this in any of his publications.
Chuck posted briefly on this formum about his trip to Brittany France with Wout Klingens, but you'll find more information this in the Mead Lovers Digest archives. Try
www.aboutmead.com where you can do an archive search.
A little more on Roger Morse -- Morse's research into meadmaking during the 1950's and 1960's was not widely known since it was restricted to beekeeping journals. It was Ken Schramm and Dan McConnell who read his material and then presented it to meadmaking community in speaking engagements and a 1995 Zymurgy article on meadmaking techniques.