High volume players like BigJohn have algorithm's that they use to project max points per $ spent. Personally, i like doing the research myself ( it's part of the fun for me). Finding a really good pitcher is important so looking at team wRC+ (vs lefty/righty), Park factors, wind ect are all important. You will see that FD will send out an "insider" article for picks saying player X is 4 for 12 vs X Pitcher. Ignore that s***...It's worthless.
I feel like BigJohn or JFaS could probably answer this better. But ya...the more information you use the better you will do.