Yes, and you want the high potential in the skills most important to the offense and defense you run. No need to spend more than 5-7 minutes on a skill not critical or a skill below 20. And if they are below 15 in a skill (some coaches say 20), don't waiste any minutes on practice.
WE and playing time are also important. Make sure your younger players are getting some minutes. I also prefer a WE of 30+ and I never take a guy below 20 when recruiting.
You must understand that putting minutes into Conditioning will affect 4 differnt areas, so you get the most bang for the minutes there. Def and FT shooting are the slowest to improve.
Finally, you need 5-7 minutes to hold a skill where it is so don't practice more than that on a low potential skill. 10-12 is a good number for a guy at normal potential, (a little more if you have extra minute to give or it is a critical skill). You want to spend 15-20 on skills that are high, (unless it is Def or FT or you have extra minutes). You will have to adjust that for each player.
Just realize if they are normal they will not improve as quickly or as much as if they are high potential and WE and playing time are the multiplyers.
That help?