(Sorry if there's a better place to put this)

I'm having a hard time with wall-to-walls on all 3 healers in ShB dungeons. Everyone says it's easy, they can do it undergeared and still dps etc etc but even with okay-ish gear I end up blowing my oGCDs and having to resort to GCD spamming 85% of the time. Especially SCH, I have to GCD spam almost every single time on it because I'm so bad at managing Aetherflow.

I even looked up the Balance guide for wall pull healing (for SCH) but I still struggle. And it's not the tanks' fault, either - they have good gear and use their cooldowns correctly most of the time.
Is there a guide on healing wall pulls? Or a video of someone doing it the right way?

And my gear is ilvl 437-ish on my SCH and WHM. I can't find a gear guide for anything that doesn't involve savage/EX gear (which I don't have because I'm bad) so I'm not very optimized, either.

Apologies if this is really noob-ish, I've only been playing for a few months and the community in-game is honestly not very helpful.