I don't know about the Docter, mine's an Ultradot LT and I can't get both cross bars in a groove on the PEPR mounts. IMHO the ideal setup could the Ultimate slam scope with the 250 FTX reticule and a small holo dot on top for close work. I don't know about the 20 moa dot. For my old eyes brightness is the key more than dot size. A bright dot = the fastest in close shooting for me.
BD