It is really hard to say without final numbers but right now it seems you can take a few different routes to do damage.
The 2 routes I am enjoying the most are the following:
1: Maintain Demon Count:
With this build I maintain as many demons as possible and abuse this with the increased damage Demon-bolt gets from it. Always keeping my newly summoned demons buffed and spending as little time as possible with less than 8-10 demons active.
2: Demon Bombing:
With this instead of taking Demonbolt, I take Soul Conduit. It seems to proc fairly often and works very well with the idea behind this build. Spend your time casting as many 4 shard Hand of Gul'dans you possible can. As the timer on any of your imp groups begin to drop to 0 use Implosion. Relying on the RNG of Soul Conduit kinda sucks but I have fallen in love with it the more I use it. Sometimes you can end up with an insane number of imps (I am talking over 20).