But static meshes shouldn’t affect performance since the pathfinding should calculate from the baked navmesh. It’s only the other soldiers that are dynamic, but they don’t really affect the navmesh either. So that would only leave the collision detection between the soldiers due to the Detour crowd controller.
But yes, probably need to get hold of someone who is a bit more tech savvy when it comes to Unreal. Cause the engine is really cranky 