Hormones are way too complicated to take a blanket approach like this. For total testosterone 250ng/dl is low, 400ng/dl might be low, but it depends...
If someone is getting ready for competition and you are not interesting rolling that hard, you just shouldn't roll with them. Everyone has different...
If you practice MMA in a judicious way, I wouldn't expect 3 days a week to ruin your LP if you're eating and sleeping enough especially if you're not...