Ok, I'll try to tackle this properly this time.
The issues I've had to tackle so far (because I assure you there are issues there when you first pick up this play style)...
Echoing fury is a pita weapon, both because of its high fear proc and its high attack speed. For a witch doctor where we're always trying to get up close and personal with monsters for our bats, bears and dogs, fueling our GI, GF and CoL, and maximising damage within the limited radius of our paranoia and BBV. All this at odds with the fear proc and then
also having to deal with one of the highest base attack speed items in the game further crippling our mana supply. It's a no brainer, this item is bad news for all our standing builds.. Then I make it even worse by slapping a tal rasha's guise of wisdom into the gearing, further taking away another mana regen/max mana slot.
With this in consideration I've had to plan a build that strays from having a stream of buffs on my bar, and in the process the passives that fuel those buffs, it needs range, to be mobile and to allow rapid skill cycling. Last of all but I suppose most importantly, it requires a mana generator which is where the ebb and flow of this play style ends up setting its roots. I've accepted the fear, I've stacked my bar and passives with ways to keep my mana going, and I've turned this into a ranged, glassier witch doctor.
So the score so far. I've swapped out the star for a LoH amulet. The fear proc reduction seemed
slightly noticeable, but the boost to sustain was totally worth it. I think I was too flippant at first blush, the lifesteal on the EF is important but picking up the LoH elsewhere is a massive help. I'm also happier being much more aggressive with my acid rain use since which ties into something else I learnt in the process...
I found dropping a single acid rain before engaging a new pack wasn't particularly noticeable on positioning due to the congestion, but it completely solved (due to the fear proc) the first hit instagib possibility you find when trying to pick up that initial 5 stack soul harvest without using your spirit walk.
I think I'm going to drop the fear on the mojo and try to pick up a better one with bear reduction or +spirit barrage again. I went all out fear when I first started but I haven't seen scaling it back a little bit hurting the build while making the overall gear situation stronger, though I have room to pick up more fear on the helm again with maybe a better second stat there as well. Still trying to understand the point where it becomes 'enough'.
My current version of the build:http://us.battle.net/d3/en/calculator/witch-doctor#bfRUdg!fUc!bcaZYZ
There is some situational cohesiveness to the build that may not be immediately noticeable as well, like acid rain completely decimates a room of destructibles so you never waste any spirit barrage souls. Soul to waste lets me manage positioning for much longer without constantly having to refresh. And well of souls has a high enough proc rate to let me fear stutter step (WoStep?
) stragglers to the next pack.
I think there may still be room to adjust some of it for personal preference, for example I found with a more careful rotation, spirit barrage:the spirit is willing could replace widowmakers/VQ as a mana battery and I could slot spirit vessel and horrify:FA in to make the whole build feel safer.
Still a few more aspects to refine and cover in proper details, but I think I'll update the original post to do this and properly thank everyone for their ideas. Afterwards I may just have to learn how to do videos since I've never worked with media before, but that's for me to figure out if it's within my capability to satisfy those who'll gloss the 10,000 words and just want the video.
ps. @Tango, thanks for the information on the combined stun/freeze/fear setup. I guess I'll keep trying to acquire the gloves/belt and see how it goes.