Which Fairy IS better?

[Zaresin]

Reading some of these posts was painful.

Selene is ~ALWAYS~ better than Eos.

Let's do the math. Assuming it's an 8 man run with both you and the WHM using Physick/Cure for 1000 HP, and we are going over 2 minutes. For the purposes of this, we are worried about tank healing, and I'll explain why after.

Selene: Fey Glow shaves .15s off my GCD, and is up for 60s. Over that time, the decreased GCD gives me the equivalent of four free actions. Assuming both me and the WHM use all 4 actions on heals, that's a roughly 8000 increase in HP.

Actually fey glow and it's counterpart are each 30 seconds with a CD of 60 seconds. That might affect your calculations. Just wanted to point that out. But overall you had a well thought out post. People underestimate Selene and in my opinion if you are leaving your fairy on steady to only heal when some gets below 80% you're doing yourself and your party a disservice as you are doing less healing overal. Don't treat your fairy as a "Oh Shit" button. Treat them as a partner and work in concert with each other. Until they overhawl the pet UI that means apps like synapse are a necessity to even use a game mechanic efficiently.