Honestly most of the puas you'll meet will be in the field where you should be. After spending enough time in the feild then referancing the site, you should be able to spot a pua pretty easily while sarging.
To be honest though from my experience, you'll find that you're better off flying solo becauase everyone has their own agenda and often they conflict. Puas you meet in the field are only good for a common goal for a single night more often then not. There are ofcouse exceptions, but none-the-less you should focus on your individual skills rather then team efforts.