Well, if those are the new stealth rules, given the rolling as it was the nemesis still wouldn't have managed to target a single ship. She rolled a 4 on the first turn, 3s outside of 8 inches, and only a 1 inside 8 inches on the last attempt. Had I split AD she might have got a few missiles onto targets (more chances to get that magic 50% chance within 20 inches). But don't forget that the fighters would have been dodging like anything.