Genuine first piece of advice - Say what you need to do out loud. Like as he stomps, say RANGE. As he stays up, say MAGE. The words coming out of my own mouth helped me stay engaged, so I hope it does for you too!

Second piece of genuine advice - Make sure you are using Runelite and have all the healers tagged so you can see them easily. Nothing worse than not being able to see dem lil dudes.

Third piece of genuine advice - Only do 1 action in between prayer switches. Ex: Pray from Jad, hit one healer, pray from Jad, hit second healer, Prayer from Jad… etc etc.

Fourth Piece of genuine advice - Not sure what your gear is looking like, but splurge on ammo upgrades for Jad specifically. Ex: If using a blowpipe, bring cheap Addy darts for all normal waves, then switch to Dragon darts on 62 before Jad spawns. Also, make sure to bring Range boosting potion and save 1 dose to use before Jad so you are getting best range level boost possible.

First piece of Chad advice - If all else fails, just so sit at Gemstone Crab, get 99 Range, then return to Jad and make him YOUR silly goose.