Am I at less than 75% health? OH GOD LUSTRATE LUSTRATE LUSTRATE! Oh crap I'm out of Aetherflow stacks!

If you've only got one or two guys attacking you, use Equanimity and just use Adlos and Physicks to heal through it.

If it's a larger group, Aura Blast them away and run to safety. Aetheric Burst is pretty good for this too.

If you're far away from the rest of your team, Attunement is just going to be a delaying tactic. If you've got no follow-up plan, then it might be better to just accept the death and save the Attunement cooldown for when it might actually be useful. If you're in a situation where Aura Blast or Aetherflow is about to come back up, then Attunement can buy you those few extra seconds you need to knock them away or cure through their attacks until you reach your team. If your pet is up, she might be able to heal you up to full while your enemies swing and miss, but again, it won't do you much good if don't have a follow-up plan.

Speaking of fairies, don't forget about them! It's easy to lose your pet in the hecticness of PVP, whether from enemies attacking her, or simply rooting/stunning her while you run off, causing her to despawn. Make sure to keep an eye on your pet bar, and resummon your fairy as needed.

Always be buffing! If you're not healing, you're casting Protect, Stoneskin or Adlo. This is doubly true for yourself, since even with VIT accessories, a melee LB can take you down quick. Any time you finish a skirmish, the first thing you want to do is refresh Stoneskin. Don't forget to cast it on your fairy, too!