Quote Originally Posted by aerialrave View Post
If too much of the rocks were destroyed, that means either your DPS didn't kill the plumes fast enough, or you positioned the boss wrong and Garuda smashed the rocks herself.
Or dps/healer were standing too close to the rocks and let them get hit with her aoe. That's the most common error I see.

Quote Originally Posted by aerialrave View Post
As a tank you cannot attack the plumes without Garuda following you. There isn't really anyway to do it because Paladins don't get Circle of Scorn until Level 50 ...
She's a warrior. So just overpower.

The only other thing I can suggest is upgrade your body armor. Try for the Sentinel's Cuirass from Dzemael Darkhold. Otherwise get High Mythril Armor.
If you are still struggling then fate/leve grind to 45 and do the warrior quest. That will give you several new pieces of armor.

Zodiark is in the Chaos datacenter so you will get faster queues if you are playing during prime EU time and select multiple languages (if you are comfortable with that). You can also post in the Zodiark section of the forums, put up a party finder in game for help, or ask your free company.