Esoterica Cardiff.
I bought an 8-oz. bag on spec from my local B&M. It was in the old packaging, with the old price. I love Penzance, and I love Virginias, so I was happy to bring it home.
It burned the ever-loving daylights out my mouth. I tried it mixed with everything I could think of, spritzed it with whiskey and rum and let it dry - nothing doing. No pipe could keep that mixture from flaying the inside of my mouth. Smoking slow and easy only prolonged the agony.
Here's the turn-around:
Then I started cleaning up some of my wife's grandfather's pipes and came across a Kaywoodie from the '50s. I don't like the stingers, but thought I'd try the pipe out. Lo and behold: the Cardiff is amazing in it. It's gentle and sweet with the slightest hint of spice. The small bowl is just right for this, too.
So: a pipe I don't like and a blend I don't like come together to make a really enjoyable smoke - one I have now a couple of times per week. The wife says the blend smells like chocolate and is very pleasant.
So I hate it, except when I don't. Maybe this isn't the best reply for this thread, but that blend kept me hopping for months before I found a solution.