If you go to the websites of Stanford, Yale and Harvard--you will see that they have a strict policy. Those three schools only take transfer students who were intially waitlisted the previous year and later rejected. Or people who were accepted but turned down the schools for whatever reason. Those three schools state clearly in their applications that your prelaw stats should be within the range of being accepted as a 1L. Then they look at your first year grades. It's a twofold process.
There have been stories of #1 students at tier 3/4 schools getting into NYU, Michigan and Georgetown. So you should try those schools.
If a student is ranked first in the class at a Tier 3, do you think it is more likely than not that at least one of the two schools would accept the student as a transfer?
Would it be worth it?