Yes you should take early to see where you stand in the SATs, not lacrosse.
A coach will take a chance on you if you are academically flawless because your high scores fullfill the academic index, they now have more room to take less academically advantagednplayers.
So if you have a high SaT score the summer before junior year, coaches will recruit you quicker (if recruitable) vs waiting for January scores to come out