Echoing what AlkamosHater says about Demolitionist not being good for pets as well, Fire Skellies at that. I tried it a number of updates ago and damage was middle-ish at best, it should be passable (but not amazing) now with improvements like the Raise Skeletons Conduit but the bigger deal was survivability - Demolitionist and more specifically Defiler is horrible for survival on pets compared to it’s peers.
Relying on timed buffs like Blast Shield and Mark of Torment for your defense as opposed to passive defense like Aspect of the Guardian or Possession/Primal Bond just sucks, no innate physical resistance that Occultist/Shaman can afford also stings deeply. Defiler also provides no pet resistances or means of healing your pets up. Finally, some of the skills like transmuted BWC or Thermite Mines while great as devotion proccers and for RR are massive aggro generators.
If you really want to try Fire Skellies, save yourself the headache and go Cabalist like AlkamosHater recommends or Ritualist.