I commented to this to another fellow PM member recently and thought it applied to your question.
My initial average shot is around 120-140 yards, It isn't that I couldn't get them closer, but weird things start to happen with close coyotes. Also, I position the call anywhere from 70-100 yards based on the setup, so coyotes typically can't wind me.
My closest kills this year was probably 40 yards, and longest around 425 yards but had lots of coyotes between 300-425. Most of these were multiples where the additional coyotes took after I killed the first or second, and I was patient and got more. However, I never once bumped up my base mag on Super Hogster which is 2.9x base and 5.8x PIP. For my country, 3x is about perfect to be able to still keep coyotes in my scope, find multiples, but with the included PIP take long shots.
For tighter terrain, 2,9x is going to be too much. I can tell you that last year I used the Flir PTS536 a lot. It was really nice on singles and when the coyotes stopped for confident shots, but I can tell you even for wide open country, I felt 4x was too much base mag at times especially on multiples.