I've got the next section ready. It's a new one, pertaining largely to the need for human resources which we hope will drive greater interaction.
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Dungeon Management:

So you've got a massive army of ferocious monsters led by loyal Constructs living in an imposing Dungeon constructed by your hoard of slaves. You feel indomitable, but what does everyone eat? Where do they sleep, rest and recover? How do you keep your army armed? What happens if your slaves start feeling rebellious?

These are all very important things to consider as a Keeper of a Dungeon. These logistical problems are the second most important reason for expansion (the first, of course, being more power). Enslaving the denizens of this realm or bringing them to your side otherwise is the only way to obtain a workforce, because none of your Creatures are be capable of such menial tasks as construction, farming and mining. While capturing slaves appeals to many Keepers, some may prefer some means mind control or brainwashing, or even convincing the humans to willingly join their forces. Just be sure to keep them under your control. If they rebel and you have to kill them all, you'll be out of workers.

Even if your minions are untiring automatons, your slaves still need care or they will die and you'll have no more slaves. Chief among the requirements for your slaves and likely your army is that of food. You could construct farms around your Dungeon, and send slaves to work on those farms, although then you'll need more slaves to balance that out, and have the land around you secured. Alternatively, you could take food from others, either by raiding, demanding tribute or even trade.

Another thing to remember is that if you have an army you will need weapons and armour, and if you have a Dungeon you will need materials to build it. You'll need to log forests for lumber, dig quarries for stone and mine in mines for metals, and whatever other resources you'll need. Fuel will also be a good idea, to run your foundries, kitchens and fireplaces (your slaves are no good if they freeze and die, now are they?).You could assign some of your labourers to these tasks, or alternatively you could steal or trade. Whatever gets the job done.

Of course, you are not limited to stealing from the humans. The Keeper next door has done you a favour by gathering a large amount of resources and slaves in one place, ripe for the picking. I'm also betting you won't be happy when that same Keeper comes by and pillages a few towns which you had been earning tribute from, or intending to pillage yourself. Of course, if fighting that Keeper and taking their slaves, resources and Dungeon for your own won't work for you, you could always try to make some kind of alliance, trading goods and joining forces in battle. Just watch out for when they stab you in the back, for Keepers are a treacherous lot.