You've done a lot of thinking about your circumstances and based on your essay, I can't think of a light that fits your criteria better. If I could have only one flashlight it would be and HDS EDC. It does so many things well. Ultra low output, check. Immediate access to Hi, check. Runs many hours at 10-20 lumens, check. Reasonable size to pocket, check. Thankfully the circumstances of my life allow me to have many flashlights than one. As such, I carry the smallest thing that makes sense. Most days that's just a Photon Freedom, larger lights and headlamps are not far away. If I do venture out away from my flashlight saturated zone, I take what's appropriate for the occasion; a Titan-A, HDS, C2/Malkoff, C3/Malkoff and/or maybe a Minimus MV. The ideal EDC is what works for you.