This limbo build is only for objective-based missions. The limbo is based around protecting one objective/target or survival in one area.

Why you don't need strength: Do not focus on strength as all of [Limbo]'s abilities do not pack that much of a punch and does not really change how you play him. The only stat that you should focus on is duration and range but do not change efficiency.

Why not to worry about efficiency: When [Limbo] is in the rift, he generates 2 energy per second and another .6 from [Energy Siphon]. This allows you to generated energy for you and allies at a rapid rate if they are inside the rift.

Optional: You can switch constitution with narrow-minded but this is a personal preference as having a large amount of ground cover is better. Another option is Agur Message as it is only 4% bellow [Constitution] but offer different side effect

Overall: He is one of the best frames for defense and survival missions and somewhat viable for a spy mission. Other than that he is okay in every other mission