It's hard to recommend this game over Fire Emblem Heroes. Langrisser Mobile has more depth to its gameplay and character building, but the amount of grinding you have to do is completely absurd, the difficulty is often through the roof, and it's not F2P friendly at all. I have to give the game credit though, for it's gameplay that's better than Fire Emblem Heroes, and for the great PvP that Fire Emblem Heroes completely lacks. If you whale gachas then I might recommend this, but the grinding will still be very time consuming. Be warned.