This event has been described as very difficult multiple times by CG. The only other events that have been described as very difficult were Chewbacca and the Galactic Bounty Nest events. Carrie mentioned on Twitter that it should be pretty close to those events. One thing to keep in mind is that this is a Journey event which means each round may use a different set of characters. Don't depend on just a couple characters being able to carry you. If you want to wait and see that is fine, but have the gear ready.