Trials is all communication, map knowledge and teamwork. Now your skill does come in play but try not to 1v1 someone if you not confident. A 2v1 not in your favor, regroup and make a plan. If it's 2v3 in your favor rush it and try to wipe the other 2 before they rez their 3rd. Now the most important thing is COMMUNICATION. Just saying "sniper! Then saying his location" Can change the whole flow of the game and make a win.