Looking for Good Mods to Add

[NGXII]

I have a small Tekkit server running with a few friends of mine, and short of blowing eachother up with TnT cannons, we've run out of challenging things to do. Recently however, I saw a video showcasing an "alien invasion" mod for vanilla Minecraft, and my first thought was "There's probably an even better one optimized for tekkit!" So, I was wondering if any of you have or know of some sort of invasion mod utilizing AIs to spice up a cooperative tekkit experience, it doesn't even have to be aliens!