Challenge events too challenging? (Pirates of Corellia)

[Scarecrow]

Do you have 5 classic heroes 4*? And the forge upgraded?

New Pirates of Corellia Challenge Event – FAQ, Discussion & Summoning Results

OK, for everyone having trouble with legendary challenge last stage, I finished it with 4* classic heroes. Heroes available for everyone. And I did a big mistake and do not choose antidotes like I did. Choose axes or bombs instead; the bosses slash attacks are pretty strong. [New Pirates of Corellia - Last Stage Legendary with 4* classic heroes]