I'd also Like to add the Mindbender http://www.db.pandawow.me?spell=123040
How it should work :Described as an "improved version of Shadowfiend that is substantially more effective at dealing damage and generating mana", the Mindbender actually deals less damage and regenerates less mana than the Shadowfiend per hit. However, with a potential uptime of almost four times that of the Shadowfiend, the Mindbender is capable of outperforming it substantially, provided the priest makes the most of its short cooldown.
Deals 88% as much damage as the Shadowfiend per hit
Restores only 1.75% per hit, instead of 3% per hit
Lasts 25% longer, with a duration of 15 seconds, instead of 12 seconds
Available every 1 minute instead of every 3 minutes
Has a potential uptime of 375% that of the Shadowfiend, dealing up to 330% as much damage, and restoring up to 218.75% as much mana
How it works: Well actually this is the entire problem, it doesn't work at all, It just auto-attacks , doesn't restore mana , and it doesn't do + more dmg .