What's the best way to display hordes of Skeletal mesh characters without having too many draw calls?

I know plenty of games have done this before niagara came along so I was hoping for something I was more familiar with. So far I’ve only done basic effects with niagara… explosions, gunfire, shielding etc… So the video doesn’t make complete sense to me yet and I’m not sure if niagara characters would be able to do all the things I need them to do. But If that’s the best way to do it I’ll have to learn more about it. thanks :+1: