with C- prestige in the big 10, 70 is a perfect minimum - 80 is definitely too restrictive at that level. you want to REALLY focus on your ath, reb, and def - and if zone, sb - of course, stamina is very important too... but at that level, you have the option to basically ignore all other ratings for most (or even all) of your bigs. you really need to focus on trying to be competitive with the better teams in conference. a big man who has say 80 ath 60 reb 60 def 99 lp 50 per, sure, he can score - but you are going to be way behind your competitors in terms of reb and def abilities (not just ratings - the whole ability) - which is hard to make up for elsewhere. scoring as a team, you only need a couple strong scorers to get most of the effectiveness, so having a few bigs who cant score can be made up for. but having a few bigs who cant rebound, thats game over. so you need to prioritize rebounding and defense, which is basically ath/reb/def, and then if you can get offense, great! take what you can get. thats just my opinion of course - but its almost universally understood that across the board decent bigs CAN NOT compete in high d1. so like, a 70 ath 80 reb 80 def 80 lp big, you cant really do *anything* at big 6 level. you need to find guys who can do 2 of the 3-4 things an ideal player at the position does, well enough to compete with the big schools - and then by carefully calibrating the weaknesses of each player to make sure you dont have too much weakness as a team, you will be able to keep up.