Alright, now when it comes to Genshin impact, there are two types of damages, physical and elemental. You can choose to go elemental damage team compositions because they can take benefit from elemental reactions. Amplifying reactions like vaporizing or melting can deal 1.5x-2x damage and sometimes even one-shot enemies. However, team compositions go under versatile tweaks when it comes to physical damage. You must focus on characters that can trigger superconduct reactions, eventually reducing enemies' physical resistance. And concentrate on team compositions that value physical damage more. General, the rule of thumb depends on the enemies you're facing. If they have less physical resistance or high elemental resistance, go with physical damage dealers and vice-versa.