For a spare stove you could take a small Vargo Triad-type stove with ESBIT tabs & a good windscreen. OR... just carry a repair kit for your main stove. Wood fires are always the main fallback option. ESBIT tabs light wood very well.
Good light weight alternative.
How about being able to convert the windscreen into a twig type stove - using a couple of tent stakes to support the pot.
Just thinking out loud. This is not something I`ve tried.