Farming Ivara from Spy missions is still funny to me.
a: "Is there a way to do spy missions easier?"
b: "Yeah, just use Ivara"
a: "huh, ok. Where can I get Ivara?"
b: "Just do a couple hundred spy missions"
a: "..."
At a certain point I think the spy missions become easier because you have done them 100,000 times rather than Ivara just being that much better at them.
That said, some people still feel like they need to "contribute" in Spy sorties, and proceed to follow my Loki into a vault with their Rhino... and since they don't care about being sneaky, they trigger the alarm as they run full speed towards the console, can't figure out how to enter the room or hack, and we fail the mission. I know I should just solo those missions at this point, but there are enough groups that know what they're doing that it usually isn't a huge problem. I still think that even if you hate spy missions, you should spend a bit of time learning them (at least the normal ones, the Lua spy missions are not quite worth the effort to farm IMO).