You should recite Lion-face Dakini practice dedicated for him.

You need to burn a Hayagriva torma pill from Sera Je Monastery. Crush it up and sprinkle it on incense, and then he smells the smoke. This would be very helpful. I will send Hayagriva torma pills from Kopan. I will get these sent to you and you can burn them many times a day for him to smell.

There is a big puja called jang ga or Lion-face Dakini wrathful fire puja, where you throw a big torma in the fire puja. If possible, this can be done. This one is very difficult to do or even to be accepted to be done by anyone, so this may not be possible. Best to do this is Tashi Lhunpo Monastery. Doing this puja is quite a big expense, but I will request and see if they will accept first, and let you know.

He also needs to wear Hayagriva protection.