I find this thread to be interesting.  I have wondered what would be the best thing to carry for a way to start a fire.  Dd’s method of testing gives one measure of how good a fuel is.  I was looking for a fuel that would have the most heat output and still be safe to carry. Paraffin is about 18,000 BTU’s/LB.  There are some liquid fuels that are about 20,000 BTU’s / LB but I do not like liquids for this purpose.  The only fuel I found that was higher than paraffin was bees wax.  Bees wax is about 19,000 BTU’s / LB and similar to paraffin in storability.