I'm running a part of the Slumbering Tsar campaign tomorrow and in theory it looks epic. This is a chapter where the PCs make a desperate stand on a hill top with a gang of dwarven adventurers, facing wave after wave of undead.
Eventually, things get really sticky - more powerful undead, and a fairly lethal big bad evil guy to top it all off. But the part I'm a little uncertain about is how to run the horde portion and have it feel claustrophobic and desperate and panicked.
My specific problems are these:
1. How do I handle what will eventually be roughly 100 NPCs at the same time (including the dwarven 'good guys') without the whole mess bogging down? I'm looking for really cool, cinematic ideas that will make this really elevate. (We are using minis for this episode, btw...)
2. What do I do about the fact that my PCs have really high ACs? I mean, the truth is that the vast majority of these undead hordes are basically almost certain not to hit except on nat-20s. I've thought about having them essentially do grapple checks, trying to overwhelm the party. But most of the PCs also have high CMD...
I want this to feel more like Walking Dead, not like swatting mosquitoes...any ideas appreciated.