Avan
I think he should not become a wizard knight because he would look like a magic swordsman and that's not what this story is about. A possible idea would be that he fights with a two-handed-magicconducting-wand which would serve as a mele and a magic weapon. It would also strengthen the picture of a mage.
I can see emery becoming a wizard night, but rather than using swordsmanship offensively, he'd use it defensively. A sword's greatest strength is its reach, unlike something like a spear it can not only pierce anyone at the end of its reach but also slash anyone inside of it, plus with a hilt it's easy to parry even at extremely close quarters. I could see Emery using a sword in one hand to thwart attackers, maybe even imbuing it with magic to parry not just weapons but spells and projectiles, and in the other hand he'd have a magic wand or staff to cast offensive and even tactical magic, warping the terrain and teleporting around the battlefield. I'm actually building a d&d character around this concept myself right now, a 1 level defensive fighter who then goes all into war magic wizard! With the right feats and items, I think it'll make for an amazing gish!