Carrier Battles Mod

[Suicide Junkie]

This mod abandons the all-or-nothing counter intel projects.

Instead, you must use really cheap intel sabotage projects to discover and stop the attacks before they start.
Unless you have a lot of defending sabotage projects going against one player, you'll have to get lucky to hit their big attack. But you do have multiple turns to catch it, since the costs are pretty high.

You and an ally can also work together to prevent an enemy from attacking.