I enjoyed the map, it's a solid map, architecture is great, texturing is awesome, so many textures and details. And, the most important thing for me: playing on easy - it was indeed easy, GREAT job. 

It's always good to see the custom enemies put to use, and I don't need a reason to use them over the originals either, but thunderbolt enforcers? Dumptruck has gone too far. 

That was Greenwood's idea ages ago and ILike80sRock made it happen!

So blame them?

Also those were in Quoth so I felt it was a good add to pd. 

i'm personally a fan of grunt/enforcer variance, for a base-style map it gets really boring to use JUST the regular ones. it gives opportunity to place more low-health quick-kill monsters for the player to mow through, but still create a threat out of them if ignored.
the "rapid fire nail grunts" are the best. if well-placed in turret mode they are essentially deathtraps.

Please note - for The Rust Forge i actually decided last-minute to REDUCE the # of variants :D probably a good choice :D 

what a map. the ambient sound was great, liked the supernailgun grunts too