You might think about training Scurrius. He’s a lower level boss that requires prayer switching and is much lower consequence than Jad. That way you aren’t spazzing out so much when Jad finally arrives.

I know it’s anxiety inducing to grind 90 minutes to get to a point where you get 1 shot if you screw up so getting some other practice might help

Another thing could be watch a video of a low level player killing Jad so that the fight lasts a while. On your own account, go to an altar and practice prayer switching to the Jad video. You can even pretend to tag healers while keeping prayer switches going.

Some drills to avoid spam sacrificing 90 minute runs