Does anyone have any advice for the development of 15-year old TMax 400 and Ektapan 4x5 film?

The filmbase+fog is pretty hefty now--it obviously wasn't frozen. Scanning allows optimizing contrast, but regular analog printing is very challenging. I was wondering if there was an additive that can help reduce the age-based fog. Using XTol, the film speed still seems to be pretty good, but the snap is lacking when you look at the negatives.

Any suggestions besides the trash?