We defeated Nefarian for two days. We needed more then 100trys. I think, Nefarian is not comparable to the Lichking, becouse Nefarian is easier then the Lichking. Both are a endbosses of the instance and for both you need much time to kill. At the Nefarian trys is it easier to correct your fails. All in all, i will show you an very good videoguide about the boss. Special thanks at TankSpot!!! I think the she got a nice voice=P
In this guide you see 6 healer, but we recommend 6-8 Healers.
If you think that the Lichking 25 Heroic was easier to kill then Nefarian, then write a comment=P