2t9 + 2t10 ttw mage

Here is some idea of an unorthodox way of playing a fire mage.

-get 2t9 and 2t10
-stack spirit items
-obviously get 14% hit chance for raids
-aim for ≈ 800 haste, to get your FB casts <2s with 2t10 proc

basically the goal is to maximize crits to maximize 2t10 uptime
something like this
https://www.wowhead.com/wotlk/gear-p...UgnMVAnMUSAMUo

pros:
-can do a decent amount of damage at the middle gs range (5.5k – 6.0k), quite better than some 4t10 5.5k gs mage, who lacks crit and who will have lower 2t10 uptime
-high spirit value that greatly benefits from the 10% buff and 10% talent (and 3% racial if HU)
-high spirit value provides decent mana regen but you can still go OOM. I'm not sure at which point 3/3 spirit is better than 3/3 of 30% mana refund, but from my experience it feels like 1300-1400 spirit is the value

cons:
-to a degree it's a meme gear composition, so people will “wtf” you a lot
-at higher gs numbers 4t10 will start outperforming your gear, but you will have a hard time switching your gear composition to a different way. So there might be some delay in switching gear and hence a loss in your dps

also a small example, to show the idea. If you are comparing [Crushing Coldwraith Belt] with [Lingering Illness] (both 277 ilvl), there will be a difference of 90 haste and 90 spirit. For spirit you get 0.7*(90+90*0.23) (for human) = 77.5 crit rating. In fact, there is actually something else that contributes to the % of spirit, so it will be like 80 crit rating which is just 10 points smaller than 90 haste. While still getting regen from that spirit.