It took a while but I finally figured out the key to beating Cindorian's 1:28 time, that being to not use AR Mode! I only now realized that using AR Mode doesn't actually slow down the IGT, thus is just a pure time loss. This explains why I never could get close to the record before! The run itself though is really solid with a good final fight. I think it will be quite tough to shave off more seconds from here on out.