The only ways to get 9 points are Crit/Det (which is ridiculously expensive), or 11 crit / 31 det / 33 pie (which is still expensive and isn't great for SCH). I'm not quite sure of the break points for Acc, but I believe max Crit, rest Acc will be +8, as will max Acc, rest Crit. The spread I posted above is one of the cheaper ways to get higher Crit and Det, as well as +8 stats, as you only need 4 Tier IV infusions, and they are all 100% success.