Well, ever considered that he is actually buffed? Since you can't see the Buffs when you turn off all effects, it might be the solution to the secret

I calculated the phys defense for every stat at 50% and with maxed ice passive + buff and ended up with ~1615 phys defense. So 1700 without any other buffs is very unlikely, but since Euros have some nice buffs you can easily achive such stats without photoshop.
Concerning the attack values, at least the physical attack is perfectly ok with ~75% phys reinforce and attack. I don't have the right formula for the mag attack, but maybe someone else could check that who has the formula.
Formulas used were for defense: all physical defenses added plus the STR * (Sum of all phys reinforces)
For Phys attack: maxdmg of the sword + STR * Reinforce of the sword
Edit: For mag attack that formula can NOT be used. Can try that urself with your own char / stats!
I have checked those formulas with my own chars and they work very good. Stats of the items were taken from nivlam.com