So I said I would add to this as I had ideas on the classes and as I gathered new information so here is some more.

So I'm rather disappointed on the "fix" (*cough* nerf *cough*) so you can no longer insta-cast Gauss Barrel. This makes it a much harder dynamic to work with, but not impossible. I would recommend not holding it the entire fight, but rather use it at the beginning of a boss fight. Then maybe if you feel you have enough time pull it out later on when the a big burst is going to happen, however this may not happen as that would be a 3sec cast time, a point at which your standing there doing nothing so it would be best to do it only if you feel comfortable with such a state, and boss mechanics allow for it.

Now I've heard rumors that if somebody focuses on Skill Speed with MCH and BRD it might actually fix damage loss of GB and WM, but until this is actually proven I remain skeptical.

Next subject is the turrets, how they work, and the little dance your stuck playing with them. So when your tank does a big pull your obviously going to summon your Bishop turret dead center of the pull and let it damage from there, well this could just be me, but I've found I actually have some problems with TP in these fights, to work around this when I see that either my TP is running low, or the fight ending soon, I've taken to summoning out my Rook Turret and Using Promote. In cases where I'm running out of TP this allows me to sustain the TP I have and continue the fight, however if you pull it out at the end of a fight it will allow your group to continue onward with little to no loss in DPS, and allow for another large pull with no worries that your melees are gonna run out of TP any time soon.

Speaking of Promotion, let's talk about that shall we. So my stance on it has changed a bit since the first post. I still stand by the idea that a BRD is better suited to TP/MP Regen than a MCH, primarly because if a MCH has to TP/MP Regen they will most likely have to Hypercharge to bring everyone up, this would mean losing the 5% damage increase on the boss and the increased damage dealt by the turret (namely the rook turret). That being said, should a MCH have to act as some kind of Regen, they are best suited to be a TP Regen rather than an MP Regen. The reason for this is because of how the majority of boss fights work, in a standard boss fight a MCH is already going to have out and in place a Rook Turret making it a simple activation to begin the Regen, however in a case where a MCH has to act do MP regen they will first have to activate the Bishop Turret, this is at best a quick camera turn at worst a couple of seconds of getting it into the right place. Then of course followed by the activation of the Promotion, and then finally having to re-activate Rook Turret when it's all done.

Now I can already here someone make the argument of "Why not have Bishop Turret in place to begin with in a Magic Heavy party where you'll need to do something like that" and there are a few reasons for this. First being the dps loss, fact is Rook does more damage than Bishop, though if that's not enough to justify to you then the second problem will. The second problem being the way Bishop does it's AOE (this is based off my person experience so it could be wrong), the damage is dealt with Bishop being in the center of the AOE, so in order for bishop to be doing any damage to begin with it would have to be placed right next to the Boss, a location where no caster should be to begin with. In short you'd lose the dps, and still have to go through the whole process to move it around.

So why would people want a MCH to regen over a BRD then? Well that's also a simple answer, Hypercharge can be used more frequently than Battle Voice. Both abilities double the effect of the regen with Hypercharge being able to be used ever 2mins, and Battle Voice being able to be used ever 5mins. That being said Hypercharge only lasts 15sec, as opposed to Battle Voice lasting 30secs. This leads me to believe that MCH might take a bit more of a hit, I mean the I know that the straight math evens out to them taking the same direct hit to their dps, but I feel that the loss of the 5% damage increase just makes it a bigger loss the party as a whole.

So Final Thoughts: MCH is better suited for TP Regen, and Brd is just better for both TP and MP Regen.