Doubling down on the carbon steel ESEE recommendations. Can't strike a spark with the coated blades though. I have -3, -4 and Candirus, and prefer the 3" most of the time - it's thinner, lighter and more agile than the 4". Both good options though. Replaced all the micarta with aftermarket G10 - and it looks like that's an OEM install now.

Semi-disposable G2X and an extra set of batteries seem bulletproof. If you want (lots) more output, I've had really good experiences with an Eagletac T25C2 (does have kinda high parasitic drain).

Lifestraw or water purification tablets? I toss one in just in case, with the Emergency-C packets already mentioned.

If there's room after all the other stuff, I would consider an ultralight poncho/tarp. Can't recommend one, since the one I have is from a now-defunct company,