The First Boss
Strategy
Though this is just the first boss of the raid, Razorgore and his arsenal of spells should not be underestimated. This fight takes place in two phases: the first under Mind Control, and the second where the boss must be focused.
Loot
The Second Boss
Strategy
Though Valeastrasz is only the second boss you'll come across, he's one of the most complex, and serves as a rude awakening for your players. The boss starts the fight with 30% HP, which is a warning for how strong his DPS is. Like all dragons, the only players who should be in front of the boss are the tanks (when it is their respective turn). This prevents other players being damaged with Cleave and Flame Breath. You can also avoid taking damage from Tail Sweep by making sure no one is positioned directly behind the boss.
For the duration of the combat, all players will receive a 3 minute buff, Essence of the Red, which continuously restores your mana, energy, and rage. This buff will allow you to spam your spells as much as you want without worrying about running out of mana. However, the boss will cast Burning Adrenaline on random targets, which will force the target to distance themselves far from the rage. While under the effects of the buff, damage done is increased by 100% for 20 seconds, however once it expires, the buff will finish off the player and any nearby allies. This damage can't be prevented by Ice Block or Divine Protection.
Finally, pay close attention to your threat throughout the fight to prevent the un-tauntable Vaelastrasz from running though the room and breathing on the entire raid, even moreso when buffed by Burning Adrenaline.