For people who image a couple of hours because they haven't got their routine automated or need to hurry back in/home, 10 minutes can seem like an eternity. But if you routinely image all night, it's, well, only 10 minutes
Personally I rarely run GA. I kind of have some idea of the seeing, both from clear sky chart, the HFR autofocus measurements *and* eyeballing the sky for twinkliness, and I have a "regular" setting and an "exceptional" setting in mind, and switch between the two as needed. I don't bother optimizing for "lousy" seeing, as few keepers lurk there.
My advice would be that *initially*, you run GA reasonably frequently (say once every two or three imaging sessions) to get a feel of the differences, and try to associate them with information about the seeing. After a while, you may find, like I did, that you have an approximation "good enough for Army work."
It also depends on what your RMS is relative to your focal length. Improving RMS from 1" to 0.8" for a focal length of 420mm will not make much if any difference, but for a focal length of 2000mm it would be worth doing.