After reading on these forums that it's possible to control a Fel Reaver using the Gnomish remote (http://www.wowhead.com/?item=7506) I decided to try it on the mechanical mobs in the various Tempest Keep instances, and it works.
It's really usefull in the botanica, the mechanical mobs in there have a 3k frontal aoe, 3k instant attack, and 800 arcane explosion. In Arcatraz, it's really only useful for that double mechanical pull (because even though you have the mob controlled it still affects friendly targets with its lightning aura type thing).
Enjoy
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