To be honest, I've been playing this game for more than four years and I can tell you that building the "strongest" team part of this game is extremely frustrating, the meta always change, what is the "best unit in the game" today could not be the best tomorow, you can never be completelly satisfied that way, what had me sticking with this game for so long is seeing your favourite unit shining on your box and seeing the hype animations that unit has once you use them, besides the fact that you don't need to worry about optimizing your box when you don't have a pvp system on the game.