Maybe I've played Heroes of Might and Magic V too much and got confused, but regardless, it's impossible to quickly create and cast a spell to resurrect them. You can resurrect them, but they'll still miss their turn, and that's significant. And if you cast Antimagic, you won't even be able to resurrect them.

Added 1 minute later
Yes, it's possible that I'm mistaken because I've played Heroes of Might and Magic V so much, but even if you resurrect them, they'll still miss their turn, which is important. Moreover, if you cast Antimagic on them, you won't be able to resurrect them afterward.