For the weight and bulk of one of those flint strikers, carry a Bic lighter. Works almost every time and will start way more fires than you should need in any given survival situation.

Yes, but...
 

The BIC will run out of fuel. The Flint striker just needs a few flints. It is easier to make fire with a BIC but on a pure survival situation I like to create a spark... and hope every thing is dry. LOL.

But the BIC will still spark, even after the fuel is exhausted, and for the same weight and bulk as a torch striker, you could carry a half dozen or more BICs.

Except for when lighting a torch, I always prefer a flame over a spark, when I can get one.

TR

RE: Fire and Keeping warm
 

I am laughing as years ago an SF NCO played a good on me when I was a young LT. Well, the SFOC had a raids and ambush exercise, and; we would go out for three days. This was not the last phase. Anyway it was Nov and cold as hell. One of the senior NCO's tells me -"You don't want to carry that mountain sleeping bag when you can use this." "Sir, this is a space blanket. You do not need anything but this." Well, my ass frooze at night. LMAO.

You have to be ambidextrious to do that....:D

A spark on a Space Blanket is a great way to start a fire...

It's called "Running Away".