It definitely sounds like you've done your homework but I'm still curious to know what combination of features you're looking for that they can't be found among what I consider to be many great 18650 options.
1. High Output on max (>450lm) -> Eliminates Nitecore IFE2 and Armytek Predator
2. Really low "low" (at least <10lm, better <5lm) -> Eliminates most XM-L lights
3. Thought-out UI that makes the low mode easily accessible and usable -> Eliminates Jetbeam RRT21*, Eagletac T20C2, Sunwayman V20C and many other lights
4. Neither extreme flooder nor extreme thrower -> Eliminates Spark SL6, Shiningbeam S-Mini XM-L, Armytek Predator and Zebra SC600
5. Decent runtime on "low" -> Eliminates Jetbeam RRT21 and Sunwayman V20C
*I even ordered a Jetbeam RRT-21 and used it but I sent it back to the dealer. The selector ring is nice, but it only allows precise control on the higher outputs. Finding the lowest mode is really hard and once it is switched off on the lowest mode it does not come on again before the selector ring is moved to higher output.
The Fenix TK21 would have been perfect, but the "turbo"-mode seems to be deactivated much too early, long before the batteries are dead.
I think my problem is that I want a flashlight that is usable for close up work, reading, etc., but also provides very high output and at least a little bit of throw when needed. Most flashlights are either made for high output and tactical situations or for close-up work and general use around the house. I want both in one flashlight.
Armytek said they want to introduce two new XM-L-models, one thrower and a more floody EDC. If the EDC is a nice mix between flood and throw, this will probably be the right flashlight for me. Armytek allows me to configure the light just the way I want it. I don't mind spending hours at home trying to figure out how to program the light, as long as it works in the field just the way I want it to.