>>718459272
But you've never reached the end game. You've just done a few bosses and a few missions, so you don't really know anything. I personally like having a Yujin on the team (healer) or an Enzo (ammo supplier). Don't NEED them, but they make fights go smoother.

Also the funny thing, you absolutely can solo the challenge tier bosses. It's just more time consuming and there's no point other than bragging rights.