This is a low range but high duration build for [Limbo]. Its only survivability is thanks to [Rolling Guard]. Because of its low range, this is mainly for use in higher level defense missions, as the bubble is not large enough to cover excavators. Rift Torrent is on there so you're not entirely useless while being in the rift nearly 24/7, and the Cataclysm is too small to fight in. Roll to leave the rift, cast abilities, go back into it. Rinse and repeat.

For Different ranges and playstyles, all of which are achievable using this single forma Limbo Prime:

• For Medium Range: Replace [Cunning Drift] with [Power Drift] and [Augur Message] with [Overextended]. This will bring your range up to 124%, just slightly above normal, but close to the middle between low and high range. To maximize it a bit further, replace [Rift Torrent] with [Cataclysmic Continuum] and [Transient Fortitude] with [Intensify] to bring your duration up to 282%. This bubble covers excavators really well, and works for defense too. It's just large enough to fight inside without taking over the whole map.

• For High Range: Replace [Transient Fortitude] with [Augur Reach] and [Narrow Minded] with [Overextended]. This will bring your range up to the maximum 280%, should you need it. Unfortunately your duration will go down to 183%, but if you and your team are fighting inside it then it shouldn't be a problem keeping the Cataclysm up for a long time if you replace [Rift Torrent] with [Cataclysmic Continuum].

And in case anyone is skeptical, yes you can survive and do your part to help the team with this build. I run the medium range build for arbitration excavations and almost never die. I've done Steel Path with this [Limbo] as well. It takes a bit of getting used to if you're used to frames with more health, but it can be done.