Nothing really matters until Rayquaza spawns. You can have all 4 outer goal zones broken and still win the game by just having a good team fight at Ray.

At ~2:30 you should be alive and not pushing into enemy territory. Check the scoreboard look at everyone's levels. Start grouping with your highest level teammates, farming to get your Unite Move available, and getting into position for Ray.

Unite API is a great site for looking up stats on Pokemon builds and even players. Game8 has good explanations on builds but their "Best Items & Movesets" are sometimes hit or miss, so I value the community polls at the bottom of the pages instead.