I think if you can handle pv efficiently (you got good aoes and know how to stay alive), then PV is best for you. Barbs, Seekers, Wizzes, Psys, perhaps Clerics and Sins as well. Otherwise FC is nice, especially as you can exchange mats for blessing orders that give you 40k exp each (1 mat = 5 orders, so it's 200k exp per mat). I think the best for FC is sin, because you can just kill the bosses, skip mobs, get mats and after exchanging them for blessing orders, give them to your other chars. I think GV is very annoying and too dependent on the players. If leader dc's, the quest fails, if someone leaves the squad for some reason like "food" or such, then you might not be able to finish GV, unless among the 5 people left you got a good combo of players who know what they're doing. But apparently most people don't. Yesterday a seeker forgot to repair gears before GV, so he became useless, because he was hiding in the back and a wiz left after; GV failed. So I think GVs are the most annoying from all the ways above, even though it's not a bad exp, but not much higher than from orders/PV.
