It's not that hard if you bring the right champs. It's supposed to be a test to see if you are ready for labyrinth of legends. If it's to hard for you just keep practicing and when you get better you will be writing this for the next guy who said it was to tough.
Comments
Yeah, don't pay attention to the recommended rating on RTTL, it's not even close. You need 4* 4/40's bare minimum to get anywhere in chapter 3
Honestly just ignore the recommended rating in general if you ask me. Try it. If you fail, stop and come back later.