Spectre - Chaos Vaal Advocate

I have been trying this Raise Vaal Advocate for a while. There are two issues:

1. There are 4 types of Advocate. Please label them what type they are in the Name or Ability. If I desecrate two types, I can't tell which is which based on the corpse.

2. I believe Chaos Advocate is bugged. I saw them raising their Staff for their second spell but most of the time, nothing happens. Sometimes I see a Meteor type that falls to the ground but it's after the monster is dead. I also believe they have a Homing Skull spell but only triggered when health is low? If so, that's a terrible design. I really like the idea of Homing Skull. Please just make it a regular spell with Cool-down like 4s. Or is their second spell is a Buff skill? If so, what is it??

Please fix so Chaos Advocate can cycle their Spells correctly. I really want a Chaos pet build.