How to rate OC/DCs

[thelionheart3456]

So there was a thread on here earlier about how to grade head coach prestige that took multiple things into account what are your ideas on how to rate OC/DCs...

I was thinking of something like this

OFF/DEF Rank last 5 years with scaling like this
1*120 for first 1*119 for second and so on down the line
then move the weight down because college football is all about what have you done for me lately
either 0.8 or 0.9*120 for first and *119 for second and so on for either the last 5 or 10 years
I also think that there should be some points given for being in a BCS conference as well as making age a factor something like
youngest age-32 gets something like 20 points
33-45 50
45-55 30
55 over 10
also add in for award winners on that side of the ball somehow

so what do you guys think would be the best way to do so