Thanks again for another fabulously epic game type.
I mostly agree with timothy's criticisms, and with that, here's hoping for more maps that support this in the future ([hint], $lave, [/hint]).
Hosting a 6 minute game will cater to a full final round (at the default round length), though I've yet to check that it's calculated and applied to the final score. Regardless, I think it's best to get a feel for a reasonable final score, and host with a score limit.
This is a map with embedded shapes and lua. There are 7 "hills" on the map, and each player or team will get a point for every hill they have control of at the end of a round. The lua HUD makes it easy to tell how much time is left in the round.
This map should be played with the netscript gametype as it has embedded lua.