I prefer the flex and value speed and per in my guards and bigs more than in other standard offenses. You still need suitable BIGS mainly for D and Reb but really helps if they contribute in per, bh, & passing. If you run a press you will need very good stamina too since that particular D will tire your players and effect your fg %'s. I've found that I like to have at least 2 if not more 90+ per guards and 2 solid pf/c defenders/rebounders. It can be successful with a 3 guard rotation. Pick a plan and recruit to fill needs on how you want your team to play.