It's not that it's King, just that it is extremely well equipped for those levels. Its AoE is JUST behind Fire's in terms of output (or may even be equal/better, but I'm not sure), but is more mana efficient (3 ranks of FS is 90% base mana, Blizzard is 74%). And there's no reason to bother with LB on most trash packs nowadays, because they die way before they explode, which is a huge DpS loss (compared to using that GCD for a Flamestrike or Blizzard).
Frost is ludicrously strong on bosses at lower levels right now. Why? Because Deep Freeze is balanced for level 80--there's only one rank. You get the base damage of a much higher-level spell that adds more than double your spell power to its damage, AND gets a +50% chance to crit. Spam FB, ghost Ice Lance/Deep Freeze on FoF procs and FFB on BF procs. It's intricate enough that you'll learn some rotation awareness, but forgiving enough that you won't be punished. And for fights where you mess up, or there are mechanics that stun you/impede your DpS, Puddles will still be giving you some passive damage.
Furthermore, AB spam is really, really expensive. It matters less at cap, when you have a huge mana pool, but it can make you go OOM way too fast before cap. Once the buff reaches 4, it takes something like 49% of your base mana to cast the spell. That's 1.5 Flamestrikes, and over half a Blizzard cast. It's just too much when your mana pool isn't that much higher than your base mana. And it's AoE sucks.
As for Fire... Frankly, it sucks for single targets at that level, due to low crit values. FB spam is NOT impressive DpS--you really need your PB procs. But you will be seeing VERY few consecutive crits when you only have 15-20% spell crit (with MA active). And it has the hardest, most unforgiving rotation, I have found (with my tests). Letting LB to go too long unrefreshed is a pretty large DpS drop. Letting Scorch drop is over a 5% DpS drop (due to it giving you more PBs on top of the crits itself). And it is less mana-efficient than Frost.
And when it comes to PvP and solo PvE, Frost is just superior in everything but AB (I imagine spamming LB on huge packs of players would be maniacally fun). You get some passive DpS from Puddles, faster CD on your Nova, a snare with each spell that makes it easier to kite, a very strong stun (albeit, one that is situationally available, but saved my life MANY times when leveling and pulling an add). It's only weakness is the lack of a strong instant spell, but Fire Blast suffices, since it isn't needed THAT much. And IV just kicks *** no matter what you are doing. Ice Barrier also made my life so stupidly easy at those levels--I took way less damage than other specs and when they broke it, I sometimes got a free root.
Now, if someone wants to, all the specs are fine at that level. They all have strengths and weaknesses. But none of them really surpass Frost unless you are talking about very specific circumstances. Frost beats Fire's DpS, and I imagine you wouldn't have the mana to sustain Arcane's for a full fight. Frost has more efficient, and still highly damaging, AoE over Fire (and lolArcaneAoE). And it is also more forgiving when a pack doesn't fit into the small FS circle, which is a problem I've even had at cap.
Frost is King. That doesn't mean it can't have some rather powerful Duke cousins.
[EDIT]
Just to add, for reference. I was hitting 10-15K DF crits in my 70s. Don't underestimate what I mean by saying it is powerful.
Edited, Apr 14th 2010 8:47pm by idiggory
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IDrownFish wrote:
Anyways, you all are horrible, @#%^ed up people
lolgaxe wrote:
Never underestimate the healing power of a massive dong.