Having read this and seen some oversights, I thought I'd give my opinion on arcane:
There several builds that you can use, the afore mentioned ones by Risto, and these:
N.B. I will not be mentioning any hybrid builds like 30/0/31 10/48/3 etc.
40/0/21
40/21/0
50/0/11
50/11/0
61/0/0
40/0/21 is the haste rating build imo, gemming wise, most often +dmg and +crit are used, as the user only has ~10k mana in raid buffs so relies on the frost tree.
40/21/0 is a pre resilence pvp build (or low resilence), or a mid range pve build
50/0/11 is a high int and spirit build, usually with gems that are +8 or 10 int
50/11/0 is a massive crit pvp spec, not really useful in pve apart from heroics, when your iwinbutton is known as the '#%**off' button.
61/0/0 is a pure arcane mage, needs extremely high int and spirit, and is often considered the support class of arcane mages, due to prismatic cloak, imp dampen/amplify magic etc. ends up needing less from the raid, and gives more than a standard mage.
This spec is comparable to 'spirit mages' pre tbc. Down sides of this tree are that, if you get CS'd your arcane tree, is out for 8 seconds. and thats your only damaging tree, much like shadow priest and their shadow tree. Another down side is it requires a tremondous amount of mana to use only arcane spells. ~20k+ is needed for this.
40/0/21 (or devations of it) rely on gemming +hit, and +crit, as there is little scope for continiously using Arcane Blast (from this point forth, will be called
AB)
out of all the arcane trees this one suffer least from mana issues, because you mainly use frost and AB spell rotations based around removing the debuff.
For this reason this spec has to gem to get 126 hit, not the 76 normally needed by arcane. without the use of epic gems, this often leads to lower +dmg, but with decent gems and gear standards this gets high spelldamage. Haste rating does not affect this build negatively, and improves its performance.
however should the ghost hit rating ever be fixed, this build will suffer.
50/11/0
this build makes the most use with spellfire + 2 bits of T5. haste rating does not help it, as it is most useful in heroics, and 10 man raids. having said that however. pyro blast has exceedingly limited uses in pve once the packs have been pulled.
it is (semi) useful in pvp when you've poly'd your apponent, or when you have your 'iwinbutton' ready. you can still top the damage metres in heroics, and 10 mans, but you wont hold up much in 25 mans. where you're 11 points in fire make it all but useless unless you have gemmed +hit, to get the 164 that fire needs, where upon there is little point having 50 points spent in arcane.
50/0/11
This spec can be played 2 ways.
1) the way i dont approve of
2) the way i do.
way number 1) is to gem +dmg and +crit gems. as our OP Risto has.
Let me make this clear i am not bashing risto's explination or character, i am mearly using his gemming as an example, and that is to gem hit/crit/dmg.
This way gives you much the same benifits of 40/0/21 but IMO there is 0 point of going that spec if you are going to gem hit/crit/dmg gems. you dont have the mana to play with high mana cost spells.
Then there is way number 2)
Gem +int, +int/dmg +dmg/spirit.
An example of this is me. yes i have a healing gem in my spellfire belt, that is simply because the epic +6 dmg and +4 spirit gem is not a guarentted drop, and as im not short on stamina, i have no need for a +6dmg and 5 stamia gem, when spirit is more useful.
This build is a high int build.
since 2.4 int factors into mp/5
Elitest jerks would have us belive that :
(0.001 + 0.009327 * S * sqrt(I) ) * 5 = mp/5 i personally think these numbers are a great approximate, but that they are off by a tiny bit. only i cba to check where.
This high int build, basically puts the int factor of mp/5 to 1.5 i.e. your mp/5 = 1.5* your spirit. due to all your int stacking.
Many of you theroy crafters will argue 'dude your not maxed our your dps' 'dude your gemming wrong'
I will say this to you,
leave.
what is the point of being able to do 8000 dps if you can only do it for 1 second.?
The advantages of this build are, you can (with a spriest) spam AB.
you can use the frost spells once you get low on mana, and you can use iceyviens + AB + BL to become a monster and nuke anything you see until your 18.5k mana disappears.
Then you can switch to using frost till you have enough mana to go back to using arcane.
Another advantage of this gemming method is that in raid buffs, you get your int factor in the mp/5 to equal nearly 2.
so 1 spirit = 2mp/5
and you have 60% while casting.
reaching numbers like 700 mp/5 (not while casting) and 420 while casting.
This spec goes best with 2 t5, and then a switch from spellfire, to 4xt5 once you have it.
your crit rate is significantly higher than gemming +hit/+crit/+dmg gems.
your mp/5 is greater
your damage is slightly lower, but increases drastically in standard raid buffs to be the same, (BoK, spirit buff, AI, food, gotw + flask)
with 50/0/11 haste rating is one of your worst enemies.
Haste rating is bad for you when your oom you do little damage, haste rating makes you go oom quicker. you rarely should have a problem in this build with converting mana into damage.,
Then we come to
61/0/0 this is the purebreed arcane mage, and frankely, should not be tried till you have exceptional gear.
This build is compareble to pre tbc spirit mages. you need good spirit, and good int. and then you have 2 options.
1) approximately 20k mana raid buffed, upon getting this you can spam AB.
constantly.
2) Haste rating with good spirit, and low int.
you can spam Arcane missles with 4xt6 and good haste rating to do alot of damage, but it needs the good gear, this benifits most from haste rating as its a 5 second channel. 10% haste isnt hard to get. but thats 0.25s on a frost bolt 0.3s on a frieball. and 0.5s off the AM channel. with 20-40% haste ( still attainable with the right gear, i dont know what will happen to the rest of your stats however) you can knock 2 seconds or so off the cast time and be a machinegun.
This 61/0/0 is theoritcal, i have not got this gear yet, and it is what i think will be viable. i have done no 'theory'crafting on maximum dps possbile with this build. or any build for that matter, i have just tired them.
Having said all this, arcane does have something going for it that few other class/spec do.
Intellect gives you 4 stats.
it gives you:
spell damage
spell crit
mana
mana per 5
the 5 tier tree talent [Arcane Mind] increases all these bonuses. but as previously said, it is only suitable for some builds.
with
any arcane build, skill is important
newbies should try to learn how to play the arcane tree
and noobs should stay the hell away from it.
Having said all this, i will click post and prepare to be bashed by noobs.
Krakan
edits: typo corrections.