They stopped saying that where I trained when four MSTP grads failed to match in one year
One other factor: how related to rad onc are your 30+ publications? Many programs would rather see applicants with directly related rad onc work that could fit right into their faculty's research, rather than someone with research potential that they're not sure how to integrate into their department.
Additional thought: are you sure you want to do rad onc? Opportunities to continue lab based research are limited in this specialty. This post
FM vs path chances in top west coast programs for MD/PhD with low step 1 makes me question your motivations a bit. Have you really thought about things and come to the conclusion you want to do rad onc for some reason?