I think Amon was there but Korra couldn't get to him. I think Lin and Tenzin were looking out too but Lin was about to follow but had to save Korra? But then again it doesn't really matter since we can do what we like. I just figured Asami and Mako would get there near the end/aftermath, as opposed to doing much help. I don't think Asami would sport her fire bending just yet either.