Limbo, build-wise, is incredibly versatile in how he can be customized. Due to this, adjustments can easily be made to this build depending on preference. This build unfortunately has mismatched polarity in this build (which on standard [Limbo] isn't a problem!), so it might even be beneficial for you to do so. Overall, it won't hurt performance though. :)
This build is absolutely amazing for protecting defense/mobile defense/etc objectives, outperforming [Frost], [Gara] and other defense frames. It also has an insane amount of flexibility, with only four core mods! The bottom row of mods give this build max duration, the most important aspect of the build. With [Narrow Minded], our cataclysm actually will be smaller than default, protecting only what needs to be, for a really long time. You basically then have four free modslots, five including your exilus!!! In the build shown, I filled them with utility mods (I used basic [Flow] so it wouldn't go into another forma... [Primed Flow] is pretty overkill for this build anyway). Though I rarely would ever recommend using [Vitality] on [Limbo], I do for this build because most of the fighting you'll be doing is outside of the bubble, contrary to most [Limbo] builds. The bubble is so small you will rarely find yourself in it. Because of this, [Rift Torrent] is essentially useless on this build because you won't often be in the rift, nor will your enemies. Therefore, it and power strength mods should be ignored for this build. [Fleeting Expertise] is also a fine choice for utility. You will have to cast slightly more often, but your abilities will be so cheap that it won't be a problem. Exilus is preference, but you might need to forma your [Limbo] as I did in order to fit one in. As always with [Limbo], watch out for nullifiers on corpus maps! Your cataclysm is very small, which increases their chances of being spotted and killed before making contact, but it's still a necessary precaution.
This build is also very good for beginner [Limbo] players due to it being easy to use and acquire mods for. The build is designed for and excels most at mobile defense, regular defense (NOT SORTIE!!! I will be posting another guide for that, "The [Guardian]," that will be out soon!) and similar mission types. This build is the absolute must have [Limbo] build!