Curious. What is a room to a slab? Or vice versa?

If you had added <live load weight of room when occupied> to your list of wants, I could maybe join some dots - but... ?

Its more a room tag, showing slab levels.

In most cases they want the space/room name with the level tag for that room showing both finish and slab levels

Yeah I kinda got that - but my confusion remains - but only because I'm often asked the same - to which my response is always, "slab levels should go on the slab plan, FFLs on the finishes plan" - I know, and sympathise, "they" might want all that info. in one place, but the value of such is highly questionable - unless "they" have some artificially restrictive quota on the number of drawings?

In the end, it's a roundtrip exercise - you need to pull the respective values from adjacencies and inject said into the room, and there are plenty of ways to skin that cat using Dynamo.

I try not to question the Genius that is architects.
It's like questioning God. (The Great Architect?)

The short answer is, this is their Autocad standard. And architects in general (and other disciplines too) have trouble letting go of the "old ways" when they move to revit. I'm setting up this Template and they've asked me to invent this all inclusive tag because "Autocad can do it".
Never mind autocad doesn't do it automatically, its just put in by hand but minor detail (in their minds).
So...I'm trying to figure out a way to do it. Of course I could just add "by hand" values in but I'm trying to get the actual live values out because....database...

I'm figuring dynamo can possibly do it, I'm totally novice at dynamo though, I've tried some stuff through it, fairly basic scripts/routines I can do. I might have to see if theres a way to push it through dynamo I guess. I can always make it two seperate tags also - which is no problem but I was hoping I could group it up in one tag.

I would suggest making 2 tags to begin with. You are reading information from 2 different objects (Room and Floor), so I think it makes sense that this requires 2 tags. (Or a Spot Elevation might show the finish height and symbol required).

On the other hand I would thoroughly recommend (getting time for..) learning dynamo as it can help reduce the amount of work in the long run.
Tagging in general is a tedious manual process, so if you do use Dynamo to put room data into the floor slabs you can also use it to place all the tags automatically.

If that's what they're happy with now, give that to them and move on.

You can lead a horse to water but you cant make it drink.... You have to wait until it asks how to work the tap.

spot elevations can report the top and bottom elevation of an object so a spot elevation on a finish floor object would give you both the slab and the FF elevations. you would still need the sep. room tag.

On the proviso that's how it's been modelled.