Thank you to everyone for comments and ideas! I’m still up for discussing this further but I did just make some purchases.
Flashlight: Armytek Elf C1
This light has everything I wanted, plus some additional features I like (tail stand, head stand, magnet in base, waterproof, etc). The C1 has a lot less runtime than the C2 but I really like the size of the C1. I may make a custom leather case for it that holds it and the AMH-02 mount.
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Charger: ADEASKA SQ2
Even though I’m unfamiliar with the rechargeable flashlight world, I am familiar with electronics and electrical parameters. I chose this charger because it doesn’t just charge the battery it gives a lot of parameters that I find useful. The C1 does charge it’s own battery but since I need spare batteries, I need a separate charger. The charger has micro-usb input which I need for using it in my service van. It also can output 5V from a battery so that’s kind of cool as well.
EDIT I got this charger and I hate it (see thread) I’m going with an xtar instead
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18350: Efest IMR
18350s just don’t seem to have high capacity unless the advertiser lies about it. Anyway, this brand was recommended in an old post I found, and I was able to find them online so I just decided to get them.