Hello, since prepatch release I've spent like 20 hours on training dummies, doing 10 minutes length fight, testing things around.
Although @
FurtyIRL says Soul Conduit is better in prepatch, then it probably is. However I seemed to be doing around 6~7% more DPS with Demonbolt. Also, top warcraftlogs seem to be 50/50 Demonbolt or Soul Conduit.
With the nerf we received yesterday I cannot asure you about Demonbolt being good, though. Demonbolt surely doesn't hit as much as it used to do due to significantly less amount of Demons you spawn, providing you have 4-set pieces.