i have a question though.

As a DW frost tank, how much hit raiting should i go for?

This's my first post so i apologize for my "noobishness" or something like that.
I've tried to find out an answer to my questions in the posts above but it's an hard work through 138pages!

OK i move on.

1. Aggressive style
I use this style (as first post said) burning all my mana spamming AB during cooldowns stacking at the beginning of the fight and then evocating on last second of icy veins to begin normal cycle ABspam4MBAM with full mana.
This way i use 3 evocations per fight (well on a 5mins base time fight) and if all is plane i got even the hasted evocations.
Now my questions are:
1.1 is the "starting burning phase" good enough to add 1 evocation more to the "evocate only if needed" style?
1.2 is the ABspam the best cycle during cooldowns stacking?

2. Haste stacking and haste cap
I really can't get this concept.
2.1 When haste rating become better then spell power itself?
I read something on a 3k sp limit that once reached haste get more valuable then sp but no math demonstration.
2.2 And let me reorganize something about haste:
Soft haste cap: let's say 850 (don't wanna be too exactly, just to say a "good" haste rating for arcane mages)
Hard cap: it doesn't exist. It's always good to stack haste cause....
....i wanna clarify this even to me:
the "cap issue" is concerning the GCD: if u get more haste rating the risk is to "waste" some haste cause of the 1sec general cooldown. But really how much dps we loose on that comparing with the dps we gain for haste rating on the whole fight??
As far as i understand it's always valuable stacking haste and we need only to manage CDs with the heroism to not waste too much.
Is it right?

I think it really depends on the playstyle you prefer and where you are in the game. My guild just about manages to get two groups into ICC10 every week, and we have the occasional crack at TotC25 when we can muster the numbers. I raid as frost and given the choice I always would. I don't top the meters very often, but I remain extremely competitive in terms of my colleagues. Because we're raiding on a casual basis and primarily for fun, as long as I pull my weight and enjoy myself, I think everyone is pretty happy.

Effectively I'm enjoying my retirement now. I quit hardcore raiding about four bosses into Sunwell, having done the whole 'five hours a night, five nights a week' thing from Molten Core onwards. My former guild was top 100 globally at the end of vanilla WoW and throughout TBC, so I've done my time with fire specs etc when they were top dog; they always struck me as a bit of a necessary evil. Now I'm in a better place in WoW (for me), and I love the game all the more for it. I've stopped to sniff the flowers, I guess.

I really appreciate the reappearance of a frost thread on EJ. I might not min-max as a mage any longer, but I can still strive for it as a frost mage.

Apologies if this was too damn much blog; felt I had to defend my position.

You didn't tell us your spec; Going to assume you're Enhancement because the "rest of the melee" bit.
You also didn't tell us what you have already tried to improve your "mobile DPS", so don't blame me if some of my tips are "well, duh!".

First of all, do you have a run-speed enchant? They can make quite a difference.

Also, remember that your wolves can give you a speed buff; keep that in mind when deciding when to use them.

Finally, try to find usefull stuff to do while running, like:
casting a shock
charging Maelstrom Weap before starting to run, then casting the LB while running
Refreshing Lightning Shield
Recasting totems, Magma/Searing in particular
Purging Vampiric Might off a Fanatic
Interrupting a spell

Also, if the fight requires you to stand still outside of melee range for a few secs (e.g. Rotface, any find where you can get turned into "the bomb"), remember that you can still hard-cast Lightning Bolt. Yes, the damage will suck, but it's better then nothing.