All you need is:
1. A Warlock
2. Someone who killed the Lichking
Do the following:
- Tell someone in your Raid to log out
- Port the guy with the LichKing kill inside the instance (Tell him to not accept the Raidpopup with your ID)
- Give the guy lead
- Switch to heroic
- Tell him to give lead to someone else and log out
- The other player can log in again.
e voila -> Heroic Mode for your grp (you can switch back to nonhero after 5 minutes) no ID for the nice guy who switched