I didn't create this module, deadca7 did but decided to discontinue it. I made some modifications to it:
- Icy touch first instead of Plague strike because usually you are running up to the target.
- Check runes when using Icy Touch and Plague Strike
- Prioritize Scourge Strike when already have desolation buff
- Prioritize Blood Strike when we don't have desolation buff
Original addon page: http://www.wowinterface.com/downloads/fileinfo.php?id=15337