Oh, I forgot to talk about the Haunt thing. Could have sworn it was in a different comment. Oh well, here we go.

True, you cannot constantly keep Haunt rolling on two targets at the same time. There is, however, a small window of time, approximately 3 seconds, where you can have it on two targets at once. 3 seconds may not seem like a lot, but it's actually nearly half the cooldown, and it's a pretty big deal.

Actually, now that I think about it, the timing could be a little bit longer than 3 seconds. Theoretically, 3 seconds is likely close to the limit that you could get given an 8 second cooldown, 12 second duration, and then a cast time of at least 1.5 seconds but reduced by haste. Haunt does, however, have a fractional travel time, so based upon distance it can take up to 1.5 or so seconds to reach a target at max range.

Assuming that one target is at max range and one target is in short range -- such as V&T -- you'd actually be able to have a time frame of around 5 seconds where Haunt is on both targets. Of course this would be off-set in the next portion of the rotation, but it's a point.