Depends what I'm micing. On my firepod, drums are usually somewhere around 10 or 11 oclock. Guitar I might have to wind up to 2 or 3 oclock if I can't play it particularly loud
It varies some but this will give you the general idea;
Let's say an R121 on a moderate to soft vocal, about a foot out for a nice airy sound, maybe +40 or 50 gain.
But a QTC-1 or some hot LD condensors will put out several volts at a hundred+ spl, so with a close miced screamer I could run it at 'line level directly into and A/D or, likely have to dump voltage with an inline pad to keep from clipping going to a typical pre at it's minimum setting.
So where this is going, find out what your controlling stages are, test at the volume you are using, set the mic pre for it's nominal level, trim if needed at the track fader and/or mixer if needed to get around -12 to -18 average, with peaks comfortably below zero'.
You're in there.