Basically don't worry about trying to play a 5 man squad PG,SG,SF,PF,C. If you do that you severely limit yourself on who plays and finding a good combination of players. For instance on my legacy I changed a SG to PG and he is my starting PG, then I changed a PG to SG and he starts at SG, then I changed another PG to SG and start him at SF, I have a SF start at PF, and then have a C and I have had good results from that. If you have 2 PGs playing at once it isn't a huge problem as long as the better PG is at the 1 and the better scorer of the two is playing SG. So it really comes down to how you play and what works best for you.