Here is a lil overview of the resistence gear available, im pretty sure the diff kind of crafters can make them.
Cloth = Tailor
Leather = Leatherworker
Mail & Plate = Blacksmith (Can make this if needed)
Necklace & Ring = JC
He's a level 83 boss so max frost resist should be 83*5=415.
The 3 crafted pieces for each of the 4 armor types provide at least 285 frost resist, so including the 130 from pally aura or totem you'll reach the cap of 415.
On the discussion of FR gear, yes its doable without it on 10m, but wearing some makes the jobs of the healers much easier.
The enrage timer is set to 15m so its not about nuking him down fast its about nuking him down eventually and that goes alot better with ppl actually still alive.
I think the Grimbo wanted to know which parts you have incase he wants to tickle dragon again, so best to do is leave a message here if you have some gear.
Necklace:
[item]Pendant of Thawing[/item]
* 2x FelsteelBar
* 6x Primal Fire
* 4x Primal Water
* 1x Mercurial Adamantite
Ring:
[item]Titanium Frostguard Ring[/item]
* 2x Titanium Bars
* 3x Eternal Water
* 3x Eternal Fire
* 1x Frozen Orb
Cloth:
[item]Glacial Robe[/item]
* 6x Bolt of Imbued Frostweave
* 3x Eternal Fire
* 3x Eternal Water
* 3x Eternium Thread
* 1x Frozen Orb
[item]Glacial Slippers[/item]
* 4x Bolt of Imbued Frostweave
* 2x Eternal Fire
* 2x Eternal Water
* 2x Eternium Thread
* 1x Frozen Orb
[item]Glacial Waistband[/item]
* 4x Bolt of Imbued Frostweave
* 2x Eternal Fire
* 2x Eternal Water
* 2x Eternium Thread
* 1x Frozen Orb
Set:
* 14x Bolt of Imbued Frostweave
* 7x Eternal Fire
* 7x Eternal Water
* 7x Eternium Thread
* 3x Frozen Orbs
Leather:
[item]Polar Boots[/item]
* 8x Heavy Borean Leather
* 2x Eternal Fire
* 2x Eternal Water
* 4x Nerubian Chitin
* 1x Frozen Orb
[item]Polar Cord[/item]
* 8x Heavy Borean Leather
* 2x Eternal Fire
* 2x Eternal Water
* 4x Nerubian Chitin
* 1x Frozen Orb
[item]Polar Vest[/item]
* 10x Heavy Borean Leather
* 3x Eternal Fire
* 3x Eternal Water
* 8x Nerubian Chitin
* 1x Frozen Orb
Set:
* 26x Heavy Borean Leather
* 7x Eternal Fire
* 7x Eternal Water
* 16x Nerubian Chitin
* 3x Frozen Orbs
Mail:
[item]Icy Scale Belt[/item]
* 8x Heavy Borean Leather
* 2x Eternal Fire
* 2x Eternal Water
* 4x Icy Dragonscale
* 1x Frozen Orb
[item]Icy Scale Boots[/item]
* 8x Heavy Borean Leather
* 2x Eternal Fire
* 2x Eternal Water
* 4x Icy Dragonscale
* 1x Frozen Orb
[item]Icy Scale Chestguard[/item]
* 10x Heavy Borean Leather
* 3x Eternal Fire
* 3x Eternal Water
* 8x Icy Dragonscale
* 1x Frozen Orb
Set:
* 26x Heavy Borean Leather
* 7x Eternal Fire
* 7x Eternal Water
* 16x Icy Dragonscale
* 3x Frozen Orb
Plate:
[item]Icebane Chestguard[/item]
* 16x Saronite Bar
* 3x Eternal Fire
* 3x Eternal Water
[item]Icebane Girdle[/item]
* 12x Saronite Bar
* 2x Eternal Fire
* 2x Eternal Water
[item]Icebane Treads[/item]
* 12x Saronite Bar
* 2x Eternal Fire
* 2x Eternal Water
Set:
* 40x Saronite Bars
* 7x Eternal Fire
* 7x Eternal Water