Pretty much wanted to make this topic asking how you people set up enemies in your SP maps. Do you have low health for everyone with no upgrades, or give enemies campaign health, or put shotgunners in cover, etc.
Some things I do for enemies are:
Depending on rank I upgrade their guns (So a usurper minor would have a non upgraded alien rifle, while a destroyer would have a level 3 rifle)
Whenever I make custom units I attempt to make them units that would likely be possible/believable in the PB2 universe (such as Minigun Heavies, Civil Security Super Soldiers, etc)
Most of my enemies never reach 1000 health
Lower ranks still show up latter on in my series but in groups (lites, minors)