@Blaze.1.pr is right about that banish, cleansing, clearing, healing. Sending good health to your father can also be done, try visualizing where your fathers pain is and use a method similar to this
I’ve had decent success in helping others with Raphael, even just by meditating and repeating the mantra to him, if you do it with his sigil in focus to you the better hope it helps man and your pops feels better