i think that you should keep the two 18 y.o and the 19 y.o P all star.sell the remaining two.the one with pro JS might attract some buyers.
train the other 3 in OD first till prominent.and then u can work on JS,driving,handling or passing depending on whether u want them to be SGs or PGs(though the only PG prospect among the 3 is the 18 y.o all star)