Once you master the game mechanics and win every time, there's not a lot to do but to keep playing different combinations. If you don't feel like doing that, then there's not a lot the game can offer to you.
There's an announcement about Buriedbornes 2 getting released at some point of the next year, so that might have something to respark your interest on it.>>141615
Those are the bread and butter of Dragoon, since he's all about reflect damage. Without them it's better to just play Warrior or something else with Plating.