I can never avoid Numemon. All I can figure out is that I'm not paying enough attention to weight and overtraining. That made my evolution fucked and made it nigh impossible to win a fight since that's tied to your defense stat. Which is a weird idea. I can sort of get it because that is a thing in Monster Rancher. But in MR it was just a point, not your main way to enhance the stat.
And I'm not really big on drivers having a durability mechanic. I don't want to waste them but I do want to experiment since that's all the strategy the game has. Why not just have them work like the battle plugs from Brothership where instead of them breaking you have to wait a few fights or hours for them to recharge? It makes the game feel like a mobile game that is trying to make you spend money on it.