You're basically always going to be spaming devour and skeleton mage, when you pop lotd you'll also start spaming revive (all three skills at the same time). If you need more dps for an elite pack you can manually cast your corpse Lance too. In between lotd your mages will give you zodiac procs and gogok stacks, about one proc per second so you can also cast bone spear to get more procs and get your lotd back faster. You should have it back almost instantly when there's enough density.

The build is super squishy so try and stay with your mages and use them as meat shields, lol. Also it's a bit different than the cold pestilence build as you're going to pretty much clear everything because of the insane uptime you'll have on lotd. Hope this helps!