Tank: Only one tank is required for Sapphiron. If you can get wow gold away with frost resist gear while remaining defense-capped, wear it; if you can't, don't bother. Tank him where he "spawns" as you begin the fight, don't move him (doing so will usually get your melee DPS tail-swiped), and keep him facing the entrance to the room at all times (some raids prefer him to be tanked facing the steps to Kel'Thuzad's room). He'll need to be picked up in the transition from Phase 2 to Phase 1, and you need to be very careful to move him as little as possible. Move straight back; strafing here will usually get the raid tail-swiped or cleaved. Most tanks favor high-mitigation and/or high-stamina gear on this fight, as part of your heal team may be occupied at any given moment avoiding Chill.

DPS: This is not a particularly melee-friendly fight as Sapphiron's range for both cleave and tail-swipe are very large. You'll need to be in close quarters around his hind leg, and if Chill hits melee, the damage is wow gold tremendous. All DPS has to be aware of Chill and its likely path at all times. Otherwise, the only other thing you'll really need to worry about is getting well out of range while the tank picks Sapphiron up between phase 2 and 1. If you have to hug the walls, do it. Pump out as much damage as you can otherwise; the constant healing needed for Frost Aura is essentially a soft enrage.

Healers: The fight depends on you and the raid's ability to avoid taking unnecessary damage. HoT classes are very useful for raid healing as Frost Aura damage is constant, but you'll also need to worry about a lot of wow gold tank damage. Druids and Shamans on 25-man should make sure they're not all on one side if the raid's being split; draft Mages as necessary to help decurse Life Drain. Players learning the fight frequently underestimate Chill damage and must be told that staying out of it is their responsibility. Damage from Ice Bolt should be minimal (2-3K on the targeted person) and shouldn't be a worry, but the 10K+ splash damage on any player nearby is unacceptable.