Star Renegades

This is the second boss in the game
You can only face it with 4 characters
It has few attacks but does a lot of damage

There are too many options at this point to recommend a specific team, I will only focus on the roles and attacks and not on the characters

-Always go for the break where possible, characters that do not cause the break will attack the shield and armor in the process
-No matter the situation, don't use stun abilities as the boss will react by punishing the party hard
-If you can't stop an AOE defend with the whole party, there are abilities that allow you to defend your companions or cause counterattacks
-The faster you take off the boss's shield and armor, the more damage he will take to HP
-You can be aggressive as after every boss victory the whole party will be completely cured, even from deaths

(Personally, I prefer to face this boss with two Tanks and two DPS if possible)