>>54813976Pinkacross has a good videos for team building advice
https://youtu.be/AYD5Uc7_Qhshttps://youtu.be/EI_prbCvADoBut in general I'd first decide to understand which pokemon are my win conditions most of the time (the sweepers) and which pokemon will allow you to get there (your defensive/offensive core). If you want to see how that plays out look at and test the sample sets in the OP and see how each team functions to win while using other options to avoid defeat.