I used to pigeon hole the SF position as well, and just played a SF there. I now use it as a flex spot, as mentioned here already, for SF, SG, and PF. The idea being best player. I have recently started recruiting more "hybrid" talent for this spot. Again, best player with the best ratings to attack opponents. I like having a third PER option to put pressure on the D, so I always try and find high-high shooting SF, who can pass and handle the ball. Many seasons I don't have that, so I will park a PF in that spot to get more reb, block shots, or even take advantage if my PF can shoot. A shooting PF is my new guilty pleasure by the way. This is the long answer, but for SF see how comfortable you can get recruiting great talent over instead "well, I have to sign a SF here." It will open up your offense, and give you more options. Just one more guy that can shoot lights out, or come with low post, or crash boards can swing a lot of games your way. Hope this makes sense.