For more that I try it.... I still unable to find any good thing in poor Ifrit-kun....

Reason? Garuda can extend your poisons, that's all you need to know, rest is meaningless. (Have her in obey, so you can choose the best moments for doing so)
Time ago I used to think that Ifrit was better for one target because skill damage + auto attack.... But if you're tempted to think so, forget it, just test the following, put in your hotbar the command 'obey' alone. Select an enemy with ifrit, press Obey, let him kill it. Then try with garuda...

You'll notice that Garuda's skill is more or less same damage than IFrit's skill + auto attack. So basically in that matter they deal same damage....

PS: Titan is for the lulzs... Or, rather... TOPAZ CARBUNCLE IS!