[Inferno Hardened Gloves] + 8 stam patch
[Inferno Hardened Chestguard] + 15 resillience enchant
[Blastguard Boots] + 15stam x2 + 12 stam enchant
[Blastguard Belt] + 15 stam x2
[Blastguard Pants] + 15 stam x2 +
[Prismatic Sphere] +
[Nethercleft Leg Armor]
[Phoenix-fire Band]
[Amulet of the Torn-heart]
[Wyrmcultist's Cloak] + 15 fire res
40+60+30+30+43+30+24+39 = 296, add on aura. I don't think you can easily avoid using the heroic badge items, unless you want to risk it without crit immunity by using greens. Crit immunity is pretty much needed - a 25% resist + crit = ~15k spike damage, which is just damned nasty with all the rest of the damage flying around. Resillience is especially good for getting crit immune for it, but defence is good for the extra avoidance. Using the +30 resillience guardian elixir might be worth it too, if you're a bit short. I normally use a flask though - 20.9k health without imp/commanding isn't bad.
Check the damage in chart:
Wow Web Stats
Total fire damage mitigated: 67.2%. I did get horribly screwed over with 3 (or it might even have been 4) lasers in a row, so the blazes were slightly out of control at points. My mob also got DPSed second, which explains a bit, but it's still a stupid amount of damage.