Board Thread:Help Board/@comment-26361493-20150925075628/@comment-26464987-20150925154022

You can literally burst him/her really fast before she does any of her burst damage. I beat trials 1-4 all through auto-battle. Take a look at my profile, and I think you'll get the idea of what to do.

Assuming however, you don't have the damaging units. Just make sure you have a reliable healer on your team, that can mitigate damage as well, and if possible also provide a DEF buff.