5-6 crews per airframe is "industry standard" for domestic regional flying...getting up near 10 crews means abnormally high airframe utilization or international flying. As an example, I believe the MD11 at UPS was around 13 crews per airframe not too long ago.

RJET had 226 aircraft per their last 10-Q...at 7 crews per airplane that would be 3164 pilots. At 5.5 crews per airplane, that number would be 2486.

How many pilots does RAH have?