I take it back. Andromedon Shells are in fact bull****.
I hacked one to shut it down. So. Easy to take out. Got a bunch of 75% shots off my snipers with pistols, 85% off my supports, 100% shot on my still-stealthed ranger.
Guess what. They all missed. Including the 100% shot. Are you ****ing with me, game? Is this something you forgot to mention? Can't shoot an Andromedon that's shut down?