This is a cheap, easy to get build for [Limbo]. I'll say it right up front: I don't really like [Limbo]. I think he's usually more of a detriment to a team than an asset; there's little, if anything, he can do that other frames can't do better and in a less obtrusive way. That said, if you want to play him, this is a reasonably effective way to do so. His 1 isn't super useful, but his other powers are very cohesive. You use his 4 to create a large "rift" zone. His 2 will freeze enemies inside the rift. His 3 will give us bonus damage for every enemy it hits. It's effective, and actually pretty good for defending things. As long as you try to stay mindful of letting your teammates play the game by not just putting up huge rifts in weird spots, [Limbo] can be good. He shines best in solo though, in my opinion.

If you want a forma'd out endgame [Limbo Prime] build, I have one here