Dusting off my WHM need help!

[Risvertasashi]

So just sticking to the very basics, and using a dungeon as an example, my pull might go something like this

1. Regen on the tank when all mobs are red, while I'm still running in.
2. I might have used Benison prepull. If I didn't, use it now.
3. Use Assize and Presence of Mind. Begin holy spam

4. When the mobs are stun resistant, and if they aren't nearly dead:
4.a. Refresh Regen on tank
4.b. While the GCD is cooling down, use Tetragrammaton on the tank
4.c. Throw down Asylum on the tank
5. Resume DPS.

If the tank needs more healing? Afflatus Solus. Cure II is a last resort, one that I only typically need if DPS is really low and stuff isn't dying. And of course, work in Thin Air and Lucid Dreaming as necessary to keep your MP up.

We could obvious talk a lot longer about priorities, situations with exceptions, and so on, but I hope this gives you a basic idea of how to get started in a dungeon - and lets you see the principles others already talked about, such as priority to oGCDs.

[MartaDemireux]

So just sticking to the very basics, and using a dungeon as an example, my pull might go something like this

1. Regen on the tank when all mobs are red, while I'm still running in.
2. I might have used Benison prepull. If I didn't, use it now.
3. Use Assize and Presence of Mind. Begin holy spam

4. When the mobs are stun resistant, and if they aren't nearly dead:
4.a. Refresh Regen on tank
4.b. While the GCD is cooling down, use Tetragrammaton on the tank
4.c. Throw down Asylum on the tank
5. Resume DPS.

Some adjustments I would make would be to tag enemies with Dia/Aero during the sprint/mob gathering period. Really helpful since targets that you're able to get a DoT on will die around the time that Holy's stun is resisted, if not before, which reduces the amount you need to heal after that point.

Then, when all enemies are gathered, Swiftcast a Holy and then use Assize after that so you don't waste that MP recovery.

And just want to point out to OP on MP management: using Thin Air and Lucid Dream "as necessary" means to use them liberally. Pop Lucid Dream when you get to around 80% MP and then every time it comes off cooldown (every 60s) during a fight (unless you're at max MP of course). This will keep your MP high to facilitate Glare/Stone spam and get you more uses of Lucid Dream over the course of a fight (which means more MP). Thin Air has a decent recast of 120s and should be used for Raise when possible, when you (rarely) need to hard cast multiple AoE heals, hit 50-60% MP, or otherwise for every Presence of Mind Holy/Glare window when they line up. And again, the sooner you use it in a fight the more uses of it you'll get in a fight.

[Risvertasashi]

Some adjustments I would make would be to tag enemies with Dia/Aero during the sprint/mob gathering period. Really helpful since targets that you're able to get a DoT on will die around the time that Holy's stun is resisted, if not before, which reduces the amount you need to heal after that point.

This comes with caveats in that not all tanks will tag every mob, so you can pull aggro doing this. Also it slows MP regen, so if you are low after the last one, it can be beneficial to not tag mobs to facilitate MP recovery.

I was trying to avoid too much conditional stuff in my post... this is one thing that can work, but, use discretion to determine how appropriate it is in a given party/situation.