Whispy here
Ok im going to link here lots of videos how to down a raid boss its prety useful and we dont need to spend extra 15mins in raid to tell tactics about bosses. I hope this will help us.
Karathess https://www.youtube.com/watch?v=aQS7O39mIWQ&feature=related (Look add positions and killing order)
Loot god alar https://www.youtube.com/watch?v=c0MlAdf-_Wo&feature=related
L the blind https://www.youtube.com/watch?v=slptKK5ooJE&feature=related
Hydross https://www.youtube.com/watch?v=zbFIP24vjfE&feature=related
Ok then comes 2 hardest bosses in tier 5 instances so i found 2 imba tactic videos from warcraftmovies theese videos are so good that after you watch em boss will be like 75% easier. First 1 is vashj
Vashj http://www.warcraftmovies.com/download.php?id=42710&mirror=3
Kael thas http://www.warcraftmovies.com/download.php?id=45298&mirror=4
Ok after that we shall move to MH
Rage winterchill https://www.youtube.com/watch?v=bo6yLMBwybU&feature=related
Ok i shall edit other videos when me are futher on raids.