You'd probably have to use some of that math we been hearin' so much about.
We know it has a very deep and open central core, othwerwise there'd be noplace to throw henchmen.
I'd say that a series of concentric circles is a good starting point for that large dish, so long as you have a big cargo offload area in at least one of the 6 segments.
At a guess, I'd say that main disk has 6 segments, and multiple floors within, so you might have a couple of upper floor catwalk segments.
There are also "other" floors that are probably outside the scope of a wargaming scenario… Niskou's office/freezer which can see down into the central core… the dungeon in the level below the main disk (No idea why I think it's there… I guess I just like my dungeons lower than the rest of the ship.)
picture
^ There's a couple of levels of deck plan from the Enterprise… Looks like they opted to cut up most of their concentric levels into rooms. Perhaps not the worst starting point.
builds a pond for his campaign.