I have noticed that witchdoctors get no epics. Musketeers get double tap, swashbucklers get first strike and bucaneers get veangence strike But witchdoctors get nothing. I have seen witchdoctor companions such as mormo get mojo echo, or mojo raising, or cowards bane but vadima gives witchdoctors no epics. It would be nice if witchdoctors got a couple of epics.
Witchdoctors have access to staves that can hit 9 targets at once, and that is comparable to the epic Improved Mojo Blast. But I know what you mean, an epic like Mojo Echo would be nice on a witchdoctor since for Old Scratch that epic triggers on his spell.