Stat Priority:
Hit(Cap)>Spellpower>Haste>Crit>Spirit>Intellect
-Hit cap for Frost PvE is 14% thanks to http://wotlk.openwow.com/spell=29440, which is 368 hit rating. Having a talented Balance Druid or Shadow Priest in your raid to provide Improved Faerie Fire or Misery respectively lowers your required hit to 11%, or 289 rating. If you're a Draenai, or are in a party with one, you can lower your hit requirement by 1% (down to 13% and 10%, or 341 and 263 rating depending on raid composition.) The Hit Cap is extremely important for Frost because missed spells do no damage. Additionally, missed spells cannot grant you Brain Freeze or Fingers of Frost, which is a further DPS loss.
-Beyond hit cap, raw Spellpower is huge for Frost. With http://wotlk.openwow.com/spell=44572's massive scaling (over 200%) and Spellpower being the only stat that benefits your Water Elemental, it outpaces other stats.
-Haste is incredibly useful for Frost. With http://wotlk.openwow.com/spell=42842's naturally low cast time for a primary spell (2.3 seconds after talents, compared to 3 seconds for a talented Fireball), Haste goes a long way. Additionally, since haste increases the amount of casts you can dish out, it effectively increases your http://wotlk.openwow.com/spell=44545 and http://wotlk.openwow.com/spell=44549 uptime, which is very important.
-Crit is a good stat, however Frost benefits less from Crit on gear than other specs due to http://wotlk.openwow.com/spell=12983. http://wotlk.openwow.com/spell=12983 gives 50% extra crit chance on "frozen" targets, which includes all spells cast with http://wotlk.openwow.com/spell=44545 active. Because of this, you can eventually reach a point where spells that benefit from http://wotlk.openwow.com/spell=12983 have over 100% crit chance, the excess of which is wasted. Don't neglect crit, but don't gem for it.
-Spirit can be essentially read as Crit Rating, thanks to http://wotlk.openwow.com/spell=43046 (and associated glyph.) Assuming glyphed, Molten Armor translates half your Spirit to Crit. However, pieces with Spirit sacrifice other stats for it, and unlike many Mage specs, Frost has no while-casting mana regeneration, meaning in most cases gear with Spirit is sub-optimal.
-Intellect provides a very small amount of crit, and increases your maximum mana pool by 15 per point. Intellect will naturally be accrued on your gear, and you should never run into serious issues with mana. The mana from Intellect is important to your longevity; http://wotlk.openwow.com/spell=44557's Replenishment can usually sustain your mana pool through most fights. Never gem this stat.
Note 1: There is an AoE cap of 10 targets, after which AoE spells start doing diminished damage to each further target. http://wotlk.openwow.com/spell=42926 's burn ignores this cap, meaning if your group is doing a particularly massive pull for some reason, it will easily outshine any other AoE damage option.
Cooldowns: DPS: http://wotlk.openwow.com/spell=55342
-Summons 3 extra "you's" that cast Frostbolts and Fire Blasts at their target. They do decent damage while they're out. Note that their AI is rather poor and they often tend to stand around doing nothing. If you have your Water Elemental summoned, ordering it to attack something via. the pet bar will also order your Images to do the same. Use it on cooldown, if possible alongside your other cooldowns. Note: While Mirror Images is active, your threat is considered 0. When it ends, your threat returns to what it would have been if you hadn't used the images. This means you can A. Use Mirror Images to ignore threat temporarily, but also B. That if you generate enough threat during it, you may pull the boss as it ends, which could be disastrous. http://wotlk.openwow.com/spell=12472
-Powerful haste ability that massively increases your casting speed. Use it on cooldown. Those with significant haste from gear, however, may wish to avoid using http://wotlk.openwow.com/spell=12472 during Bloodlust/Heroism. Spells below 1 second cast have wasted potential due to the hard cap on global cooldown of 1 second, so if your Frostbolt dips below 1 second during http://wotlk.openwow.com/spell=12472 and Bloodlust/Heroism, either use Icy Veins at a different time, or re-structure your gear to have less haste. http://wotlk.openwow.com/spell=31687
-For those without http://wotlk.openwow.com/item=50045 , treat this like any other DPS cooldown, using it regularly. The Elemental does benefit from Bloodlust/Heroism if it is present before it's cast. For those with Eternal Water, your pet should be summoned as soon as you enter the instance. If it dies, it can be instantly re-summoned with the spell.If you have a Water Elemental summoned while using Mirror Images, ordering the Elemental to attack a target will also command the images. http://wotlk.openwow.com/spell=11958
-A powerful, powerful cooldown. Enables you to chain two http://wotlk.openwow.com/spell=12472 back to back, use http://wotlk.openwow.com/spell=45438 twice in a short time, as an immediate re-summon for your Elemental, and much more. It has a lengthy cooldown, so keep that in mind.
Defensive/Utility Spells: http://wotlk.openwow.com/spell=45438
-Makes you invulnerable but stops you from moving or casting. Use it to avoid otherwise fatal damage, to shed aggro off of yourself, or just as a safety measure. With a hefty cooldown, use this wisely. Note that there is a 30 second debuff that prevents you from using this again (if you use http://wotlk.openwow.com/spell=11958) after you use it. http://wotlk.openwow.com/spell=11426
-A massive shield on a low cooldown with a low mana cost. Use this to soak any incoming damage to yourself if need be at little cost. Thanks to the long duration, http://wotlk.openwow.com/spell=11426 can easily be maintained, and sometimes chained depending on when the shield is broken. http://wotlk.openwow.com/spell=67765
-Drops all threat after the duration ends, setting it to 0, which can let you DPS with impunity if used later in the fight. It drops threat each second of the countdown, so it can be used after pulling to try to get the offender to leave you alone. Can also be (rarely) used to save yourself a painful repair bill under certain circumstances, which is always handy.
-http://wotlk.openwow.com/spell=43012 and http://wotlk.openwow.com/spell=43010.
Much like http://wotlk.openwow.com/spell=11426, these spells can be used in certain fights to soak up damage. While not as powerful as http://wotlk.openwow.com/spell=11426, they still help. Note: If one puts points into http://wotlk.openwow.com/spell=28332, these spells can potentially prevent massive damage and restore massive mana. http://wotlk.openwow.com/spell=12051
-Main method of regaining mana. Using it during a fight incurs significant DPS penalty, so if possible, avoid using it. That being said, restores a huge amount of mana very quickly. Using Ice Barrier before channeling can help ensure you don't get any pushback. http://wotlk.openwow.com/item=33312
-Gives a shot of mana that takes no time at all to get. With 3 charges per conjure and a 2 minute cooldown, your mana gem is a valuable tool to your longevity. Try to use it only when you'll get full benefit of the restore. http://wotlk.openwow.com/spell=43020
-In desperate times, this little shield could very well save your life. It doesn't absorb a huge amount however, and is very mana intensive, so use only if dire. http://wotlk.openwow.com/spell=2139
-There are a number of mechanics that can be prevented with spell interrupts. Counterspell doesn't use the global cooldown, so it can often be used with no dps loss at all, and if using it could make a difference, do it. http://wotlk.openwow.com/spell=30449
-In PvE, a far too often forgotten spell. In many dungeons there are enemies that cast a wide variety of buffs on themselves that can be stolen, some of which are ridiculously powerful. Abuse this!
Nice guide +for sticky. How much are your deep freeze crits assuming you're 6k+? I believe frost doesn't pull as much dps are other mage specs but how much do you pull on an average?
As soon as deep freeze was fixed I made a mage. Frost spec is so fun and deep freeze crits are nice to see :p
Couple of questions:
Is the water elemental getting correct stats from its owner because it seems like its not scaling correctly. Also should the water elemental benefit from what other pets have the 90% aoe damage reduction because it get one-shot off of marrowgar flames and its pointless to use it in any fight with aoe. Its a good dps boost to keep it up though just like any pet. Im just not sure if it should actually have the damage reduction buff itself or it just doesnt come with one. Never played mage on retail so i cant remember :p
The Elemental seems to not be getting as much health as it should, but the damage scaling is fine since they fixed it. It is indeed supposed to have AoE reduction and be able to survive fights, but it doesn't.
Nice to see this thread, I've always been a fan of frost and used to raid with a die-hard frost mage back in retail (He levelled as frost back in vanilla and refused to switch to another spec unless the boss was frost immune).
The spec is obviously not the best dps spec there is, but it brings amazing utility and survival along with respectable dps. Too bad about the glyphed water elemental though, it's a sizable part of your dps lost.
One small thing though, can also move one point from Frost Channeling to get a point in Imp Blizzard - It's very rare that you will actually run out of mana, assuming you use your gems and evocation properly.