It wasn't an EASY E-Killer sweep per say, but Steel would have still had the game in the bag since e-killer was going to take out 2 mons at least before fainting. Why would you risk the Scald Burn ruining your sweep though :(
Excadrill would have been much better set up fodder imo, but getting Arceus in for free on it would have been a task in itself.
Still would have only taken down 2 mons if
aim got MoonBlast out of Sleep Talk. I don't think there was any coming back after Lugia though, aim would have just been able to even out the score more I guess.