Best tactic for 5 rogers?

For 5 early in game, recommend:

At least one strong tank/warrior to help keep rest of your team from being attacked by warriors.

A engineer that resurrects or heals can be useful early on in game. Later might not need.

One gunner to protect your engineer from a teleporting attack artifact.

The rest really optional, if your warrior dies too fast maybe two. If your gunner dies too fast from teleporting attacks, maybe two.

Some event gear is really strong & can help base team on that gear. Can also use artifacts to replace some Roger fighters.

As you get stronger in game & get more gear/artifacts your team will change many times. Best of luck.