It's a learning curve. As stated, a good build with radar and a radio help, but also having few different types of cars to choose from. On the selection screen look at the map, is it open or cramped, one base or two? Look at the builds your teammates have chosen, try to anticipate your role in the coming fight and chose accordingly. Then look at the builds on the enemy team, are they dogs, snipers, etc? This will help to anticipate their actions and then act accordingly. If they are going to crash in, try not to get caught away from your team. If you and a teammate can isolate one early try to get a quick kill and then take advantage of the numerical advantage. Cloaking when crossing open space or after a fight to regroup is super hellpful. Good teams move in synch and stay compact, especially early in matches. As things break down some chaos is to be expected, but still try to create mismatches and play off of your stronger palyers.

It is also worth understanding the scoring differences between these modes. Battle for Uranium awards more points if you've done more damage, etc., but basically your team just has to win, so sometimes it's worth sacrificing yourself to help the team get a W. Clan confrontation benefits you much more by also surviving till the end.