[@Light] You know, I thought the description of the magus on Aika's character sheet sounded familiar.  The Magus is a badass pathfinder class, I'm running one in my Pathfinder game now and he is far and away the most damaging PC on the party.  Please tell me this means that Aika has the power to spellstrike people(SHOCKING GRASP MLG PRO).

To answer your question, while I suppose the D&D method of spellcasting could work, I was modeling Tybalt more in the vein of Fire Emblem games in practice.  Both Fire Emblem and D&D require some sort of material or focus to use spells(so long as you aren't a sorcerer, bard, or druid).  However, in the case of D&D, you have a limited number of spells known to your spellbook, and even then it's limited to castings per day.  For me, that doesn't mesh with FE Play, as for many magic-users in the past the use of magic is their only weapon, only now having them use swords and weapons as well as spells.  Similarly, D&D has very rigid and well-known spells that do specific utilitary things(grease, black tentacles, fireball, etc.) but not much more or less, whereas in the Fire Emblem universe it is simply utilized as a weapon, with no real evidence of other practical uses.

With this in mind, I was utilizing Tybalt's magical prowess as more superhuman than practiced specific spells.  I figured he had a natural energy that he would focus through the use of something like an Arcfire tome to project an effect of fire, while using an Arcwind would produce a different effect with the use of the same amount of energy.  I suppose that would be closer to a sorcerer than a wizard in D&D standards, but with no limit on how many uses per day and is heavily reliant on the focus.  Of course, in FE fashion I would have these tomes degrade over time, due to the amount of magical energy being forced through them causing them to deteriorate.  In this way, I'd keep true to the utilization of magic in the Fire Emblem Universe.

However, if we don't want to have two entirely radical different methods of magical practice, we could collaborate over PM and try and find a good system for how magic works in this world, that way everything in this kingdom flows together well and creates a good grounding for future magic users.