Eh, maybe? Technocrats in general just... don't really deal with ghosts. From the Death Sphercanum, there are only a couple things that a Technocrat would even really want:
- Forensic investigation/determining causes of death. This is also replicable with Time postcognition; as such, the need for Death here is spotty.
- Detecting undead. This is something they might actually want to do, and might legitimately be a reason for Technocrats to pick up the first dot. For ghosts, this should be folded into Dimensional Science. Detecting via Life perceptions probably can handle other undead by virtue of "there is something really weird going on there oh shit vampire".
- Deathsight. It's a form of Mage sight, so any Sphere should be quite capable of performing its abilities.
- Manipulating darkness. Technocrats don't... really believe in darkness as a thing apart from the absence of light. If it's the equivalent of Obtenebration in a metaphysical sense, this also might be heretical anyway. Most Technocrats would want to take this through Forces.
- Interacting with the Underworld and the Shroud. This should probably be a thing that Dimensional Science does.
- Destroying ghosts and ectoplasm. Something NSC and related other-Convention groups might actually take, except Dimensional Science phasers.
- Destroying other things. Use the appropriate Sphercanum for the thing it is. Or Dimensional Science phasers.
- Countering others' uses of Death. This is the sort of thing Primium and other Prime countermagick is made for.
- Shielding via entropy. Every Spherecanum can shield you, Death is not necessary for this.
- Making zombies. You might actually want Death for this! Moooost people aren't going to be inventing White Tower units though, and IIRC this in modern times will likely be done through Sorcerers.
Manipulating ghosts in non-pewpew manners and interacting with souls are at best questionable unless it's strictly a resurrection-type thing.
Seems to me that apart from the things 'borrowed' from other non-Spirit Spheres, the thing to do here is simply let Dimensional Science continue to work in relation to the Underworld and ghosts the same way it interacts with the rest of the Umbrae and other EDEs. And use lots of Primium/Thaumium, but you should be trying to do that a lot anyway.
Maybe particular Technocrats with particular interest in certain phenomena - such as vampires or doing ItX research into binding ghosts as AIs - have institutional subject-specific knowledge or are doing research into Death, and have some dots in it. That's for
specific projects though; Death simply doesn't
do that much that a good little Technocrat who leans Dimensional Science should even
want to accomplish.
And a naughty Technocrat isn't going to care about its rarity or questionable orthodoxy.
