got something else to throw into the mix ^^

set ur minions with a focus on different mobs.. that way just like with mages you can chain fear and use curse of recklessness to stop them from running to far away, when they start moving in CoA and byebye mob! can be used with coil too as you mentioned for mass fearing ^^

and to keep you destruction ^^ Shadowfury + HoT, then when they return shadowfury + HoT etc.. you should be able to do the shadowfury with just two of ur clones as its on a 20 sec cooldown, so by the time they return u'll be half way through the cooldown (HoT will have to be over at least 4, so make sure it's on round robin )