Sequence the cancer. Get involved in clinical trials early.

There's no "biohacking" cancer without pharmatech. It mutates. You would need a two or three sided attack. There was a concept on causing the cancer to have an "extinction event" and I agree with that, due to how cancer mutates.

We're also missing tools to see how effective treatments are, on a day-to-day basis. This may be out of technological reach.

Also, keep in mind, the blood-brain barrier is difficult to deal with.