Well you know I'll have something to say. It's pretty hard to tell at this point what's overpowered and what's not, because we're so far away from anyone reaching level 50. But here it goes.
The Mime seems strangely under-powered to me. The ability to switch between basic classes is very cool and allows for some great strategy opportunities, but at the same time the Mime is only as powerful as a single basic class allows it to be. Not to say that they can't be powerful, in some cases better than advanced classes (Barbarians trade power for accuracy when advancing to Hunter, for example), but some of the abilities of the BCs might prove weak against the incredibly powerful enemies we'll be facing at level 50.
Still, a very neat and simple class that could very well prove me wrong.
We came, we conquered, we...? well it's been almost a week since I last played Rome: Total War, but I know that quote was important. Anyway, the Paragon seems good, too. I think Restoration is overpowered, though. It will negate the need for any outside-of-battle healing. Classes that can heal will have plenty of ether at that point, and Grand Potions cost a mere 10 gold. Rolls 1, 2, and 3 seem good and balanced. At first, I read the Truce roll as "the remainder of the battle", which would be completely pointless but for a round it could be very useful. I think it should be changed to "the next round", though, because heroes will be attacking the current round, and won't be able to choose to heal or use items.
I like how this class gives 5 additional base power, as well, but I'm sort of confused on how that would work. If someone rolled, say, a critical hit, the strength of the strike is equal to their WPx2 added to their level... then added to any remaining power? Or should it be WPx2+Power? In which case all of the class descriptions would need to be changed... the way I did it with Xander in Quest 29 was the former, to just tack on the additional 2 power that his artefacts gave him, but it might be more difficult if there is more base power, rather than on an artifact.
Now for the Prophet. To be frank, I think it is extremely under-powered. The shield roll is okay, but rolls 2 and 3 are nothing that the Necromancer can't do. Also, while the two new job traits are neat, they don't offer any in-battle advantage and are subjective to each QM. I can't think of any alternatives off the top of my head, but when you compare the job traits of the Paragon and Prophet, it is clear which one will make a more powerful character. This is also true for BCs, but they are not as consequential and they are more balanced (for example, while a Barbarian can restore part of their health automatically, they cannot use ranged attacks).