I was actually thinking about this mic (which i have used often, and seen used often in different ways than i used it )
here's how i've come to understand this setup (907 > d8 )
1- it's a mid-side microphone, with a directional element in the point/front of the mic (so pointing at the floor or the ceiling, both of which i've seen, might not be the best idea)
2- the two settings on the mic determine the width of the stereo image . one click is like being back in the crowd, like a 90 degree ortf, the second click is like a 110 ortf, for when you are close to the sound source , like stage lip.
3- the mic has its own power element, so it can be run line in. mic in on a d8 provides power, so if the mic is already powered this is unnecessary.
4- levels s/b conservative, since this setup is known to 'brickwall' even when you're not peaking the levels to -0 db . at a loud show, i usually have it at around 4.5, 6 or more if it's a quite thing.
does this sound about right to you cats who actually know ? this is just what i've picked up here and there.....