Can you unlock Chewbacca at 7☆ without Dengar and Greedo?

"Darth;c-1792761" wrote:
You need Bossk as leader and Dengar for sure! If u want any sort of chance, and even that you’ll prolly have to try a 1000 times cause this game is so balanced.......

The event may be difficult, but it isn’t that difficult, especially if you have Dengar and Bossk. There is a decent amount of RNG involved. If it is taking more than 100 tries with the optimal team then you probably need to add gear or change mods.