Here is how all my current siege maps work.
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The two teams are isolated from each other by locked doors for the first 5 minutes of the game.

Both teams get boatloads of resource nodes.

The aliens' resource nodes are easily defended as they are all in one room that the marines can't reach without going through the hive room.

Aliens have until the 25 minute mark to defeat the marines, or else a teleporter activates in the marine base that gives marines access to the "siege room" which is a safe location in ARCing range of all 3 alien tech points.

Could you please describe what this mod does in detail? I'm not sure everyone knows.

Tested this new build a few times, exploits appear to be all fixed, good job :)