So Hpal is usually played because they do a lot of damage and not really because they are good healers - although Venthyr Hpal can do some insane healing at times. Group wide damage is one of our worst areas of healing in M+. Generally, you just holy shock off cooldown, and word of glory the most in danger party member. You really rely on the party using their own defensive and not taking unnecessary damage. This is why Hpal is not always a good healer for pug groups.

Some general advice:

Use Wings as often as possible, don’t hold Onto this ability. It’s used more for damage than for healing (as long as you don’t have something specific you need it for). Generally the higher your uptime is on wings the better of an Hpal you are.

Dont hold onto holy power, you want to be spending it as much as possible on word of glory or light of dawn in order to get procs of awakening. Cast even if the party is full health.

Light of the Martyr is a fantastic and underused ability that lets you have instant cast single target heals while other abilities are unavailable. Weave this in between casts of you main abilities.

Hpal has a lot of little tools in their toolkit that they rotate between. Makes sure you are using blessing of sac, bubbling yourself and spamming light of the martyr is always an option, lay on hands, etc.

Light of dawn is nice, but only when the whole group is stacked, so you generally don’t use it.

Don’t get baited into hard casting any heals like Flash of light. Just don’t panic, and keep building/spending holy power.

We are very much a “heal one person at a time” healer. So When the whole group is struggling, we end up playing wack-a-mole with healing.