[@The Harbinger of Ferocity] An interesting possibility that I don't know if you've considered... Have you looked at the latest Unearthed Arcana for Sorcerers? There's an Earth Sorcerer option that gives the tankiness of a barbarian, but allows for a full caster at the same time. Alternatively, Eldritch Knight fighter would allow for a character with relatively high INT, as none of our other classes appear to focus on that stat. We have a lot of CHA and WIS currently. That's assuming you want to go with a full-caster party.

If we do go with a full caster party, we should probably be aware that casters tend to be less than tanky... it looks like my character will tend to be a front-liner (bladelock, ya know). To counter that, we might want a Paladin (hey, it's a caster). The downside is that 5e paladins tend to be rather underwhelming for the first few levels (but get super fantastic once their auras really start kicking in). Certain Clerics can be fairly tanky (War, huh... that's what it's good for?), but I'm not sure which archetype the Raven Priestess would be. 

I'm not pushing for a full-caster group, personally. If we end up with one, it would be quite interesting, though. A friend of mine is making an NPC party of UA Sorcerers and calling them the Avatar group. There's Air, Earth, Fire, and Water Sorcerer archetypes, and they look like they could actually be a viable party.