<p>I don’t think SCEA at Harvard would really improve your chances, to be honest it would be a huge reach either way. On the other hand, I really think ED at Columbia could push you over the edge and really improve your chances. Are you 100% sure that you would be able to afford Columbia no matter what? If the only school you would prefer over Columbia is Harvard, then depending on your financial situation I would say Columbia ED might be the better option.</p>