Sniper's Dream v2.0
Sort of in the vein of Everybody's Mortal But Me, but with way more complexity. A central hill, in the middle of a raised cross... with lots of platforms (all nicely fast) and lots of teleporters (easy to figure out)-flow is superb, plenty of weapons... carnage should be really high.
Levels in map "A Sniper's Dream 2":
A Sniper's Dream 2