Suppose I activate Jean Francois’s Seal of Fire. This includes the detail where my team’s defense skyrockets instead of getting reduced, should anyone try to afflict such a heinous ailment.
Then second, I activate Killhare! She deals 300% damage to the entire enemy team, but gives the rest of my squad -20% defense.
You know the rest. Sounds like fun to me. The only potential holdup: Killhare’s -20% defense penalty is “undispellable.” Undispellable effects can still be blocked, right? I’d be countering the effect before it applies, not dispelling it?