The Tavern

Why are there plain orcs in Vaults? At that point they're trivial enemies that give basically no experience.

Checking the Vaults spawn list, you can only get orc knights (depth 1) and orc warlords (depth 4), both of which will spawn with bands that are worth a non-trivial amount of exp in vaults.

...bands of plain orcs.

I concede that it is possible to get a band of entirely plain orcs, but even with the minimum orc knight band size of 3, it's only a 7.9% chance.

Even if you get one plain orc, it's still one early-D monster showing up when you are XL15+.

I think a lot of those band monsters are totally unthreatening. It might be better for bands to include just one or two orc sorcerers/high priests and nothing else.

Or maybe Orcs can be removed entirely from Vaults -- they are already common D and Orc, I'd say they are an overused monster type right now.