In DC Dark Legion, you can use 5 heroes per battle, so it is important to use a team comp that will have the best synergy. Each hero has a unique role, skills, and affiliation. Especially affiliations like Justice League that will give bonuses if you use 2 or more heroes from Justice League in the team comp. It is extremely hard to create the best team because you will not have the best heroes or heroes from the same affiliation.
Also, there are so many factors that you have to take into consideration when creating the best DC Dark Legion team comp. So you have to study each hero and plan in the future what hero you should get and invest in and use the DC Dark Legion tier list.
When you create a team, it is important that you have 2 guardians that will tank all the damage while your DPS and support units can do their job. If you do not have a hero that we recommend, then use what you have but test it. It is not hard to do testing. By testing, you will also learn a lot about the game, how to counter certain teams, how to implement new heroes that are released, etc.
Under this, you will find some team compositions that you can use, but it is best to test team compositions by yourself and always check what other players are using. Meta is always changing in this type of game.