If you go to Exeter / Andover or similar- I’m guessing your college counselor will have much better info for you. They’ll know where the 70th percentile gets in.
You have a lacrosse offer from W&M? So that’s your floor.
Do you want to play lacrosse? If so, are others recruiting you - because I’d start with that.
W&M is as strong a school as any in the country.
Good luck.