A three-level 5D map. Once you get the hang of it, the flow's great. Mapmaking detail is pretty nice, as well... great for small to medium sized groups.

A large, open arena with a semi-protected hill, surrounded by dual-level rings. Needs a bigger group if carnage levels are gonna be really high...

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.