what sucks is im on three waitlists. i dont know if i want to pigeonhole my chances with an LOI.
Hmm, one thing you could do is write really really enthusiastic letters of interest to Columbia but not commit until you get a second-interview invite (at which point it would probably be safe to start sounding more committed).
Maybe I'm dense, but I don't really understand how writing an LOI to one school could reduce your chances of getting into the other schools. I mean, let's say you're on three waitlists, at schools X, Y, and Z, and your chances of getting off these waitlists are currently x%, y%, and z%, respectively. If School X is your top choice and you write an LOI to School X, then your chances of getting off the waitlists will increase to, say, (x+10)%, y%, and z%, respectively. Now, let's say that after you write an LOI to School X, you get accepted to School Z but do not get accepted to School X. Then, even though you did write an LOI to School X, there's no obligation that stands in the way of your accepting School Z's acceptance. If School X accepts you after that, then you'll have to drop School Z and take School X, but my point is that writing an LOI doesn't negatively affect your *chances* in any way; it just locks you into going to School X if School X does indeed eventually accept you. So my advice is to figure out which of your three waitlists is your favorite and write that school a letter of intent. As long as you don't later change your mind about School X being your favorite, writing a letter of intent to School X and letters of interest to Schools Y & Z can only help you. I think.