Mil Dots are supposed to be good for ranging. Not true! That is unless all animals are the exact same size. Never happens.
Mil Dots are supposed to be good for hold over. They are pretty fair for that but only fair. Figure 3.6" per mil at 100 and 36" at 1K. Each Mil do should be 0.2 Mils in diameer. That makes the bottom of the dot 0.1 mil low and the top of the next dot down 0.1 mil high. Say your at 1K, thus you have 0.8 mils to discern or ~29". A half mil is easy to discern. Just split the difference and bracket the target with the two dots.
But say the drop chart says 0.7 mils. That is hard to discern from point 8 or point 6 and 0.2 Mils at 1K is ~7". That will miss a chuck, PD or yote easily.
Using the Mil Dots for hold over/under is way faster than clicking, depending on the scope. But for me it has, in several cases just caused me to miss faster.:(
Now take the IOR and MP-8 reticle in MOA @ 18X and you have 20 MOA in 1 MOA increments to use. That would make clicking pretty much unnecessary, I think.
I don't think that there would be anyone who would argue that clicking isn't more accurate than hold over/under.
BTW, I appreciate you low power consideration. That's why I'm strongly considering a 3-18.
I may be the slowest guy on the mountain . . . . but . . . . I'm on the mountain!