Powerbacks need a lot of confidence. Using all those steroids require a specific type of Narcissistic personality or you just wind up hanging your self in the bathroom with your belt. Pump Confidence then Vision because you need to see well to inject your self with needles.
DUH powerbacks need STR.
Retire, startover, dont touch speed until Str is at the 60 cap, at least. train Str/Carrying on intense
I don't think you need to cap Carrying by level 13. I think that Agility is more important to cap first.