Ya man, I am working on my 3rd QB at this point, I have tried a lot of different things with the other 2 which were absolute failures. The SA's do absolutely nothing until around levels 25-30 and I would not even recommend them until thirty. Why? because they work based on a percentage of your base attributes so the lower your base attributes are, the less the SA's do for you.
As soon as you can I would take Throwing to first cap (training throwing/vision), then vision to first cap(while training strength/something), throwing to second cap, strength to first cap. Train confidence/stamina as some point.
Put all EQ into throwing. It should not be spread around multiple different attributes.