Could a blue explain whether Demonology PvE is intended to be a spec that relies on the Succubus for single-target fights, instead of the signature pet from speccing Demo, the Felguard?
Simcrafts currently have the Succubus as the highest single-target DPS pet and the Felguard as higher for AoE situations (and this has been the case for a while now). However, the Demon Soul buff for the Felguard (+15% spell haste, +10% shadow and fire damage for 20 seconds) is obviously better than the buff for the Succubus (+10% shadow bolt damage for 20 seconds), since the Felguard's buff provides +10% shadow damage and thus everything the Succubus buff provides and more. But Simcrafts don't show the buff from the Felguard being enough to make it the pet of choice for single target fights. So Demonology warlocks end up using the Succubus on most boss fights instead of the pet that we can only get from being Demonology. And we do (I think) silly things like soulburning an instant-cast Felguard in Bloodlust to get the better buff, then ditching it to get back the Succubus.
Is this intended? It just seems weird to me that the pet we get only from one tree is a pet we don't use in most situations (about 7/12 - Chimaeron, Omnitron, Atra, Nef, some versions of Halfus, V&T, Ascen. Council, Al'Akir).
This is true. Currently, the Succubus is the highest DPS Warlock pet for both Affliction and
Demonology. Her single-target damage is so high, that Affliction Warlocks go so far as to glyph for Lash of Pain for an extra kick. The Felguard is current #2 choice for single-target situations and #1 choice for AoE.
That being the case, fights like Magmaw would more-than-likely favor a Felguard Warlocks given the necessity for AoE whereas a fight like Chimeron favors Succubus Warlocks given the fight has one single boss.
Here's something else to think about. Patch 4.1 will see the Felhunters damage being doubled and Mana Feed granted an increased proc rate if the Warlock uses either the Felhunter or Felguard. Theoretically, this might make the Felhunter the ideal pet for single-target situations for both Affliction and Demonology Warlocks and the Succubus will probably become just another fancy picture taking up space in our Warlock spell book (just like Searing Pain and Enslave Demon.)
Either way, it seems one pet is continually being left out of the overall picture when it comes to the most viable Warlock specs.