Some tips can be applied to all casters.
Update from questions on forum and in game whisps:
Traits:
3x tunnel of ice
Pvp talents:
Deep shatter
Frozen orb placement
Temp shield (swap to klepto vs Rdruids)
Stats:
-You need 25%+ haste
-After that you stack versa as high as you can. You should have 15-25% versa
- Crit is your 3rd best stats in pvp, but far less important than haste/versa
- Mastery is pure garabage in pvp for frost mage, you dont want any item with mastery on it
Dmg rotation:
Practise to shatter your frostbolts in 4 different ways
- With pet freeze
- with ice nova
- with flurry
- with normal ice nova ( close range )
- Macros
Make macro for counterspell focus / polymorph / spellsteal focus.
You want to kill the dps while sheeping the healer in 99% of the games
Essences:
Breath major
Conflict minor
lucid dreams minor
Focus iris minor if your are blow 25% haste, otherwise you can go with vision of perfection, life force. You can pick what feels best.
Corruptions:
Tier 1: Gushing wounds, haste/versa corruptions
Tier 2: Tenticals, Stars
Other corruptions not worth useing in arena. Stay below 39 corruptions always.
Gameplay:
Keep pumping the dps together with your Disc.
Get a sheep on the healer, then use all your instant damage on dps. Comet storm, ice nova, icicles, ice lance, flame essence,
RE-sheep the healer or let your healer fear.
Repeat until they run out of cooldowns and win
How to land sheeps vs different healers:
- Hpala : just blink in and sheep
-
Rshaman : start casting sheep then blink behind him so he cant interrupt (he can only interrupt targets in front of him)
Priest : Fake his premention then sheep him normal
Monk: Sheep him normal, sometimes double blink since he has good mobility
Rdruid : Dont try to sheep Rdruids until you have good preasure on the dps (below 40%) Then start sheeping Rdruid while he is casting heals and cant sit in cat form. Also every time you pop icy veins, you should be able to land 1 sheep and get the Rdruid trinket. When you have icy veins active the cast of sheep is below 1 second and its lower cast than the Rdruids global cooldown. So you should be able to catch him before he has time to shift.
How to Counter The most common comp Disc/rogue
Vs rogues the trick is to play Conflict Major.
What it does: Doubles the versa reduction damage in stuns.
Example: I have 25% baseline versa in arena with 8 stacks of conflict minor, and then I have 2x corruption that proc 1700 versa randomly when I take damage
( = 20% extra versa when it proc, called surging vitality) This versa proc is great in arena since it almost always procs when you get stunned.
In stuns I therefore have 25% versa + 20% versa from corruption proc = 45 % versa in most stuns and 22.5% reduced damage.
Conflict major will double this damage reduction in stuns, meaning vs rogues I will have 22.5 *2 = 45% reduced damage in most kidneys.
The damage from bike trinket and dres trinket in stuns is therefore around half and I barely notice it hitting me.
Most rogues also play with tentacle corruption and to counter this you want to make an weakaura to show an icon whenever you or you teammate is targeted by a tentacle.
When you see this icon pop up, you press a macro that targets and ice lances the tentacle, pretty much killing it in 1 second. When you see the WA, just press the macro and its dead.
DH/DK + healer
These teams you have to dampen to reduce their self healing. Usually we just sheep dps 3 times -> MC dps away from us -> rooting him with pet far away from us and after that I can sheep him again, and we do this to 40% dampening then we start to play the game like normal.
Warlocks
Warlocks you just have to do more damage than you take. Play on a pillar and just kite him with instant damage. Track when he is useing the spell " havoc" , its a curse that means he is about to coil both you and your healer. Press a macro to dispell this curse from your healer instantly. That means when he coil it will only coil you and you healer can instead focus on dispelling you, so you can both get back in LOS without takeing damage. It is a very hard matchup but with some practise you can win. You healer needs to play double dispell to dispell most of your fears.
Gonna push glad in 3s soon aswell, if you are a rogue/Disc with 2400xp and wanna have some fun and practise hit me up in game 
