" My question was: Why 170? (Pass Stamina x 7)/16 = approximate pass attempts per game & (Run Stamina/4) = approximate rushes per game IIRC. I guess that lines up to a little over 60 snaps."
I would use Pass Stamina*.4 and Run Stamina*.3 to aproximate attemtps per game.
Pass Stamina of 50 and Run Stamina of 140 then equals 20 passes and 42 run attempts (run-heavy offense with just enough to get you thru a game)
Pass Stamina of 100 and Run Satmaina of 73 then equals 40 passes and 22 run attempts (heavy pass emphasis, ditto just enough)
I used a 65 pass / 100 run stam team recently with good success; partly because it seems to me (& others) that hte SIM gives a guy with only 10 rush stamina a little more "grace" in extending his attempts, proportoinately, than a guy with 50 - said another way, three "10s" appear ot get more carries than one "30" without signifcantly affecting their performance.