I'd recommend something along the lines of:
+5: Discipline, Deceit
+4: Empathy, (insert whatever is useful)
+3: Conviction, Lore
+2: pick two that feel good
+1: pick two that feel good
This Conviction/Discipline setup will give a magic user with ability to do high damage, and very reliable spells, but with weaker effects outside of attacks. If you don't have an athletics of +2 or +4, I'd recommend devoting some of you focus slots to a defensive enchanted item. Because this character is somewhat flexible in what he can do (that is to say, he isn't 100% focused on magic) I'd recommend going with the sorcerer template to start off with, so that you can use the extra fate to maintain versatility.
Rotes should be pretty easy. This setup gives three rotes, so pick an attack, a maneuver, and a block or second attack. Make the maneuver 3 or 4 shifts, make the (first) attack either 3 or 4 shifts, and make the block/second attack 5 or 6 shifts, depending on how you set up your focus items. Choose whatever elements seem appropriate.
He'll have a pretty decent niche as well. He'll be able to do really nice damage in combat, as well as pull off all kinds of deceptions in social conflicts. He's the perfect character to run a con job with, and can handle himself if things go poorly. Plus he'd be good at gambling. In fact, you should probably make one of his open +2/+4 slots Alertness, to go with the gambler theme.