Allies of a fallen foe will go into a frenzy, but they can't kill what they can't see and you'll be the shadow that shoots their way to victory in Skyrim. Anything alive after one hit from an archer is likely not going to survive for a third round, especially against the dreaded stealth archer. That is, of course, being a bit charitable.
RELATED: Skyrim: The Mind Of Madness Quest Walkthrough Call them archers, snipers, bowmen, whatever you want, but don't call them names unless you want to end up looking like a reverse porcupine. But a well-placed arrow in Skyrim can hit targets for as far as your gaming device can render them.