I needed one for an emergency kit I take bush. Similar requirements and after much forum lurking decided on jetbeam jet1mk.
-Twisty, no switches to fail, easy lockout
-Runtime, excellent on low and medium
-AA or nimh
The only thing I don’t like is the tint, its not at all pretty…… For its intended use that dosen’t matter. Took it hiking a few times using only low, the hotspot is quite effective at lighting trails. If tint doesn’t bother you, I recommend it.