Having your body and your mind shaped up is the first essential in the outdoors or in a survival situation (maybe in life in general/).

But imagine if your pack was five pounds lighter, cost no more, and was equally reliable? There are lots of examples - a quart sports drink bottle (my favorite is gatorade) is lighter than the ubiquitous Nalgene container, just as reliable, and significantly lighter. I like my nice light Pocket Rocket stove for most situation. It is hotter than your Coleman, and a good bit lighter. It has never let me down. On the other hand, I have not used it yet in seriously cold conditions. I think the best stove for winter is a liquid fuel, much like yours.

I spent several years evolving the perfect SAR pack which had to be comprehensive, workable for a variety of emergencies, and ready to roll almost immediately. I had some spendy stuff, but a lot of it was fairly cheap. I used an alcohol stove - simple, foolproof, cheap, and reliable, and less of a hassle than white gas. Getting and keeping the wheels and motor (me) in shape was critical.

Don't set up a false trade off between light and reliable - sometimes there is a sweet spot where they coincide.