Originally Posted by msheahen

Just to ask again... why is SR more important overall on this piece than FR?

1. The Shadow Flame resist property is unique to the cloak.
2. I'm reading that some future BWL fights are Shadow-based mob/boss attacks...along with the known FR ones for Vael and Razorgore. There ARE Shadow Resist cloaks elsewhere in the game, though not many (e.g. [item]Pale Moon Cloak[/item])
3. I'm sure someone more knowledgeable than I can give a better, more specific answer.

Originally Posted by Arkamis

Short version:

Vael: big fire
Broodlord: Fire Resist needed for Rogues. Full tanking gear required for warriors (we can heal out of the MS and Blastwave, but will end up letting rogues fend for themselves)

Firemaw: Stackable fire debuff, can add up to big damage on the tank. Shadow Flame, shadow damage to Main Tank with possibility (small) of it hitting offtanks and rogues.

Ebonroc: Shadow Flame is only major magic-based damage.

Flamegor: Shadow Flame, Enrage: pulses AOE fire damage for about 3k/tick. Can be mitigated with Tranq shot. Generally not an issue.

Chromaggus: Can be fire, can be nature, can be frost.

Nefarian: Shadow Flame hits everyone, not just tanks. Drakonids have random magic damage based on color. Most severe damage is done by red and black.

And...from Wowwiki...

Shadow Flame is an ability that Nefarian, Ebonroc, Flamegore, and Firemaw can cast. It deals about 4000 cone-shaped shadow damage and is not partially resistable. Furthermore, it DoTs its target for 1700-2200 damage per second for 10 seconds (Impossible to be healed through) unless the recipient is wearing an Onyxia Scale Cloak. When Nefarian lands at the start of Phase 2 of his encounter he will use an AoE Shadowflame that ignores LoS, this version of the spell only does about 1000 shadow damage, but still applies the fatal DoT if an Onyxia Scale Cloak is not equiped.