Definitely apply SCEA but I don’t think there is much boost in that. The higher SCEA admissions rate is primarily driven by the fact that it includes athletic recruits, a lot of legacies, development cases and generally is comprised of stronger candidates overall. Apply SCEA because if you get in, your senior year will be completely stress free. There are no shoo-ins for Yale, but based on what you have described, I think you will be among the stronger group of candidates.