Kel'Thuzad Victory in 6m29s

Time	Event
4m55.002s	Tomwoodsham casts Roza with Chain Heal (Rank 1)
5m34.524s	Roza casts Roza with Chain Heal (Rank 3)
5m49.087s	Alusha casts Roza with Lesser Healing Wave (Rank 6)