So here is basically the thing so far: they are going to change dad's chemo to either another chemo, or a pill that makes it so that dad's actual immune system fights the cancer. There are pros and cons to both, but the only one that can truly "cure" the cancer would be the immune therapy. The issue is, the immune therapy that they have planned is only available if my dad does another line of chemo first, because insurance is weird and doesn't let you have the pills first. I think it's dumb but whatever.
It's one of those things where I honestly and truly don't know what the best line of therapy is, but the Lord does. So just pray we have wisdom, the doctors have wisdom (including the one that we are going to for a second opinion at Mayo), and daddy can bear whatever it is he needs to get done.