Huh. I've been playing Doom for awhile and didn't think you could do that. Learn something new everyday.
On the note of the defensive spell: I juggled around the idea myself, with it being an alt for Immolation. However, I decided that The Baron, while powerful, is a very focused spellcaster, focusing entirely on causing death, destruction and pain. I may use it in a later mod, probably Hearts of Demons : Archvile or Imp...which will be after the next one: Hearts of Demons : Revenant...which will come...maybe...eventually.
Anyway, back to THIS mod, the Vulcan's alt fire is getting replaced by a new weapon next update: The Azazel Rapid Autocannon. To make up for it, I'm making the Vulcan even more powerful and rarer. Actually, all the spawns are getting tweaked around next update. I know I said I wouldn't add any more weapons, but I wanted a general use automatic weapon.
Anyway, does the gallery here think the Vulcan should stay in the spawner where it is but just made a less common drop, or should it have a chance over Devastation? To give you an example:
Slot4Spawner:
Vulcan ~20% chance of spawn with a 50% chance of not spawning at all
Azazel ~42% chance of spawn
Soul ~38% chance of spawn
OR
Slot7Spawn:
Devastation 50% chance of spawn
Vulcan 50% chance of spawn
You can most likely expect this update next week sometime. Maybe. NO PROMISES MADE. I have updated the OP for the next update, though.