A little build up to this idea. I was looking through the harrow based archetypes when I came across the Cartomancer. Being able to cast ranged touch spells is cool, as well as having a cool new ranged option, but it got me thinking. Could you possibly take one of these two abilities and make something truly glorious out of them?
My thoughts naturally went straight to Mystic Theurge. Since Witch has the same casting as wizard, it wouldn't be too much trouble to get it online. Alongside that, the ability to cast spells through the cards never specifies that it has to be a witch spell. Mixing this with a bad touch cleric, and it seems like it'd work out amazing.
The other way my thoughts went was Eldritch Knight. A level of fighter to help make the cards effective, heading into it to get more feats, a higher bab, and increase your spellcasting. Wind up turning into a weird hyrbid thrown weapon character and spellcaster. If not Eldritch Knight, maybe Evangalist to keep the hex progression.
My main question is this. Does any of this seem worth it? Is going into another class worth giving up the hex progression? I figured since you're probably going to be spending most of your standards chucking cards everywhere, you probably wouldn't need it too much. But I'm not great at the mechanics side, so I'm asking those who probably know better.