We used app. 4.5 sticks on our its e30 cage, that was with a nascar style door bar with 3 vertical bars and 2 horizontal runners, Then we used some inch i believe for tubular gussets... might have been 1.25" dont recall. 210 ft is scary... Im not sure how you could possibly use that much on an IT legal cage... I guess you must have had a lot of drop, or a lot of f'ed up bends...
On my street car i think we used 1.5 sticks for a 4pt roll bar... Getting the main hoop to fit right and tight is usually the hardest part.
And with all that we still came in about 100lbs under weight dry