So how on earth am I supposed to even heal?
Nothing I've tried working. I barely heal myself let alone anyone else. I always see the other teams healers with 11k+, I'm lucky to get adlo off on myself.
I find it hard to believe that every single run my team is doing something wrong while the enemy always gets it right. The only common demononator between
each fight is myself, so there must be something that I'm doing.

I reiterate

Equanimity can be stunned through
Purify only ever really works once, and then I'm immediately stunned again.

I can sprint all over the place, it doesn't stop Dragoon from using Spineshatter followed by Leg Sweep to let the rest of their group catch up.
I can LoS abilities, but in most cases groups simply pincer me and stun me at a corner. I'm at level 40/30, so Morale isn't even a factor. What's going on here?