Gonna go out on a limb and guess that the new Mystic class isn't allowed? I've been using that in every game anyone will let me, but understandable if it's not.
If not, I'm kind of thinking either Bard, Wizard or both. I'd need to see your playtest material, but I've always loved Bards for some reason and haven't had a chance to really play one in a long time.
Edit: I've been reading through it, and it is very lore heavy, which is something I like. I am not as familiar with this setting, though I have a knack for learning settings, I just need to do some research, which is something I am happy to do. I love research. I've been wanting to do more middle eastern types of settings, and I think this would be perfect for that.