The Forum Warrior has the highest skill ceiling, with all the other classes not even close.
Forum Warrior’s have to delicately balance their trolling to perfection so as not to be perma-banned from the forums, while also maintaining a steady stream of posts that cause damage-over-time. Besides, no other class in the game faces the possibility of perma-death, so this alone makes the Forum Warrior the hardest class to play. So while it’s true that the Forum Warrior has the highest dps with his condition spamming dot spec, his dps requires a glass cannon build with very little room for error.
Colin Johanson to Eurogamer: "Everyone, including casual gamers,
by level 80 should have the best statistical loot in the game.
We want everyone on an equal power base.”