Georgetown supplement is 4 rather long essays - if time is an issue, look elsewhere.
I honestly think your list is fine. Columbia rejects about 75% of perfect scorers, so one deferral shouldn’t be cause to reevaluate your application list.
However, I strongly suggest you don’t submit 3-4 teacher LOR’s. It forces readers to skim through each one (they only have 10-15 minutes to read your app), and can seem like you’re trying to compensate for weakness in other areas. Two is both the minimum and the maximum you want to submit to any school where adcoms have to get through 30 applications a day. If you have an additional rec, that’s OK, but don’t have 3-4 teacher LOR’s.