Dura’s Trials Warrior Nightmare 5?

To preface, I am not a f2p player. I have mostly paragon 1 and 2 units. I have cleared every stage of dura’s trials that has been released so far with ease, with the exception of the warrior nightmare stage 5. It feels impossibly hard. My paragon 1 granny and Lucius get wiped within 5 seconds. Using recommended formations, even ones where the units are considerably less built than mine, does not work. What’s up with that?