What about the curse? Doesn't that count?
Rage, wall of fire, and other spells... they don't compare to acceleration and deceleration. And even other spells have alternative counters. Regarding the Berserker, I highly doubt it's a mass spell (though I'm not sure, I might have forgotten because I never take fire spells). Regarding blindness, you don't necessarily need to level up the fire magic to the expert level (which is what we're talking about). You can already blind enemies quite well without learning that magic (or is blindness also a mass spell? :eek: :))
And if players are using teleport, I'll see what you have to say when you can teleport once instead of four times. And regarding the Berserker, if it's a mass spell, I agree that fire magic might be worth learning, especially if your faction goes first (Phoenixes, Humans, Inferno, maybe even Elves).