The Goetic descriptions of most entities are… absurdly archaic, and while it’s far from impossible to decipher some of their purposes, what are some uses you’ve gotten from spirits you’ve worked with that may not be immediately obvious?
For example: I’ve worked with Belial for school matters. This is pretty commonly known (he has very strong “Pentacle” influence, I’ve found), but it’s still not something explicitly in his original description. And an example of an “obvious” specialty would be Sallos and love.
If there’s another topic like this, I apologize! I wasn’t sure quite what keywords to use but I didn’t find anything myself.