I wouldn't expect them to be able to. You have the characters to unlock Darth Revan, so I would focus on them and work on your mods so you can complete the event.
Look up some of the beginner mod guides so you can learn the basics. Learn about speed secondaries. Don't slice arrows with defense primaries to 6-dot. Vader, who has two unavoidable attacks, doesn't really need an accuracy arrow. Even if that Empire comp is known for success, I'd say your mods are 100% the reason then. Your characters are just too slow.
Again, look up some guides so you have a plan. You're a bit too top heavy. There's no reason to have r7 characters at this point in your roster development. Slow down on the relics a tad and don't take characters like Farmboy to g12. Go after the good teams.
