Ordinarily, someone who didn’t get into Rice as a freshman but wanted to transfer would do an honest self-assessment to figure out what Rice didn’t like the first time and then spend their freshman and sophomore years shoring up those areas. Looking at the information you provided, the main issue seem to be your high school GPA/SAT scores which would put you comfortably in the bottom 10 percent of Rice’s student body. Therefore the best way to strengthen your application this time around is to prove that data is obsolete by getting as close to a 4.0 as you can in college while taking the most rigorous possible schedule. Doing that will cause Rice to revise its opinion of you in a way that strengthens your prospects. Best wishes and good luck!