1-2 Monk levels might be a good dip. Unarmored defense/movement is good, and since your using a simple weapon, you can take advantage of martial arts.
Fighter 3 (Eldritch Knight) is another interesting dip. Its basically like a fighter 2 dip, except with 2 extra Wiz cantrips, and three spells. If your really pushing the melee aspect of this build, those spells can really help your defense. Shield, Mage armor, Absorb Elements. And you get one spell from any list. Would be nice to have a familiar. It can Help to give you advantage and deliver touch spells. Spare the Dying is a lot more useful when you can deliver it from 100 ft. away.
Wiz 2 is also good. Gets you the spells, but not Action surge or fighting style, so the school benefit would have to be really good, like Divination. You also need INT 13. Probably not worth it.
In any case, I probably wouldn't multiclass until Lv. 8-9, when you can pump WIS to 20.