Getting multiple PhD’s is kind of stupid. A PhD is your apprenticeship ticket. If you’re a supergenius and want to do research in a new field there’s not much point in entering a new PhD program, that’s a waste of time. The major work of getting a PhD is your research, if you already have a PhD and are already doing research then why do you need to be in a PhD program?
I think the University Of Wisconsin’s School Of Veterinary Medicine has a Mad Science specialization.
Psst! We have the Google machine now.
If you are smart enough to be a Superscientist, you will still need training on the equipment. All the other theory you can learn on your own, braniac.
You need master level guild training in toolmaking and machinist. Also enough undergraduate chemistry labs to learn those processes and that gear. The rest is up to you and your diabolical plans.
You would need a PhD in “arch-villainy”
A medical degree in “evil medicine”
A B.A. in theater arts to master a crazed laugh.
And one more PhD in abnormal psychology so that you could become obsessed with something really idiotic that would eventually be your downfall.