EX3 is a similar concept, except you need more mitigation before the 2nd break if the Adventurer ever gets the Brave buff from Fox. In addition, it's important to take advantage of the period coming out of break with no fox. I'll post that clear next. Cheers!
Fox randomizes out of a set of 3 different actions at first, and starts casting AoE blind to your front row on every 3rd action. The Adventurer's actions are randomized between 2 sets based on the fox's actions. (fox goes first) A cover on turn 4 would make it a 6T clear instead. Fox isn't re-summoned until the end of Adventurer's 1st turn out of break (end of Turn 6)