How do I beat Aryth? My main party is : Shadow(level 55, prof in Health & Dexterity) Light(level 52, prof in Intelligence x2) Fire(level 50, prof in Strength and Intelligence). All have armor based on level and high pointed assets. Not the rarest but I try. Is there anything I am missing? Is there any way to tell which is the REAL Aryth? That would really help...

My party works great! It's a level 60 light, a level 60 water and a level 60 air. I'd try that! One way to level up your pets is by competing in the... competitions? A yellow box comes up right below the navigation bar and will say something like,
'A wave of Myconids are attacking the fairies in Fungus Grove (0/120)'
That means there are 120 Myconids to destroy! Your pets level up like CRAZY!

I also had that problem for a while. The mistake that I did was using quick attack instead of the other element (the one you first get) since its actually stronger. Perhaps you have the same mistake? Im pretty sure you arent missing anything else.