Wish I had found this thread when I was struggling defeating ursena on hard! Anyway, I managed to pass with a 3644 all 4-star team. Yes I remembered that number that clearly because it was a really hard but super fun battle.
Here’s the final team I used to win. From L to R: Chao, Grimm, boldtusk, Sonya, Rigard. They were all maxed and emblemed, but I still lost a few times. I had a Joon on his 3rd tier, but he just wasn’t enough, especially when facing ursena’s reflects. So for like a month I just gave up on trying to defeat her. Then one day, while attacking a titan, it finally hit me: hitting the weak point with 3 tiles stuns the titan!! Seeing that I didn’t (and still don’t) have any good mana control heros like proteus, hel, or even the ability to make any time stops, I went in with my all 4-star team, revival scrolls, minor mana, minor healing, and arrows. I made it a priority to continuously stun her so my team can survive as long as possible with a fighting chance, and it worked! I almost couldn’t believe it. Now waiting the next AR to use my 500 coin reward and hopefully to finally pull Wilbur or proteus!