Gorn is killed first. He's tough but slow. They'll aim for the eyes. Then again, TOS Gorn looked like he had crystaline eyes, so who knows?
The Vulcan is next. He's strong but not a fighting machine.
Worf after that..."merely Klingon", after all.
Data finally because he's fast, strong, and downloaded every fighting move from every culture ever on his second day at the Academy. No one knows about his off switch but he and that's the one spot they'll never get even near.
Did you say 20 Jem'Hadar? You'd think a race of genetically engineered fighting machines would be tougher than portrayed (why not defend the Dominion with robots instead unless the Jem'Hadar are just so awesome?) but no. Make it 200 Jem'Hadar and it'll go down as so.