Quote Originally Posted by phuonglop12a2 View Post
Hmmm, i use Garuda, should i use 1 healer water kamihime in my wind in this event?
Usually, no. Garuda by itself is bad, you also need weapon skill levels. And since you should be running Wind weapons, the water healer won't do any damage.

But if you struggle and losing damage in favor of heals would help, then yes.
Quote Originally Posted by AutoCrimson View Post
btw, just to be sure, between 100lvl Garuda (559HP 1713ATK / Double ATK up / 40% damage) and 100lvl Quetz (708HP 1560ATK / Ability DMG up / 40% damage /20% HP) - Quetz is better as main eido, right?
Uh, hell no. Quetzal is CHARACTER attack, that's a pretty important detail you left out.

You always want at least one elemental attack Eidolon, and in this case it's Garuda.

As said by others, if your Wind weapon grid isn't amazing, you're probably better off with one of both. For the HP loss is usually not worth the damage increase in that case.