The dark fire cured remains a winner, but a little goes a long way in my pipe blends. One half leaf rolled with about two big bright leaves and then scissored makes a decent substitute for Three Nuns or Escudo.
My favorite so far is your Canadian flue cured shredded and blended with modest amounts of Latakia and Perique. Almost indistinguishable from the former Dunhill London Mixtures and way better than the current musty German or Danish versions now available.
A REAL treat is any of your bright leaf products tightly rolled with an UNrolled bit of Gawith and Hoggarth Black Irish Twist and then sliced. Makes a grand substitute for many tobaccos which have just gone away.