Haven't read all the posts but here goes.

Living in the great white north, my main concern is being able to operate the lighter with frozen fingers. It's amazing how difficult / impossible some lkighters are to light. Forget matches unless they are long wooden ones (more than one inch) must be in an easily openable container. Bics, Zippos and similar are nearly impossible to strike. You can however hold a Zippo & stike the wheel on your leg or other object.

In a survival situation, many tasks required the dexterity of bare hands. At 0 F or below (-20C) with a little breeze, you can "loose" you fingers in minutes. In a larger kit consider a BBQ lighter (many shapes & sizes available) refilable or not. I like these (not too long)


my 2c

(speaking from experience)