Kel'Thuzad Victory in 6m29s

Time	Event
4m40.785s	Roza casts Bearcow with Chain Heal (Rank 1)
5m46.103s	Roza casts Bearcow with Chain Heal (Rank 3)
6m11.472s	Roza casts Bearcow with Healing Wave (Rank 5)