I've been playing this game since it was first released and while the game is pretty generous with rewards for F2P it pretty much has become impossible for F2P to compete in the arena and anywhere you have to compete against other players because of OP units like ALL the Edelgard in the game plus a couple of other units. In the beginning there were strong units like the Hectors and Takumis but now its just impossible since the new units have basically no weaknesses and can attack twice or move.