I use this build for spy missions including sorties it's somewhat unoptimized. It mainly focuses on duration so you can keep invisibility up and it uses [Energy Siphon] to refund at least half of the energy used back by the time invisibility ends. You don't need [Primed Flow] a maxed normal [Flow] mod will work just fine same with a maxed [Continuity] in the place of [Primed Continuity]. [Stretch] is just taking up a slot so it can replaced with something like [Enemy Sense], [Natural Talent] or really anything you want if you wish. [Overextended] is being used to cancel out the negative range [Narrow Minded] gives. You can get away with a rank 4 [Narrow Minded] mod if you're short on endo. Perspicacity is more of a nice to have because it removes the panic one might get if they accidentally trip a sensor and it helps a bit with the odd chance of being displaced when trying to hack a Grineer console. It replaces radial disarm mainly due to the focus on spy missions. Decoy and Switch teleport stay because they can allow the player to bypass laser grids and sensors without activating the data deletion mechanic. Feel free to leave some criticism and feedback on how this build can be improved.