From my experience (I only play Princeton in SC), PRTN results in tons of threes and cuts for guards, not many mid-range shots, so I don't know 1-3-1 is the best to guard that. 1-3-1 lacks so much inside defense and rebounding, very hard to make up these two holes.btw: Do you know anybody who plays PRTN in league games or games that matter? I see PRTN as a "give up" tactic when I, you know, give up.