try a chaos team like this... you'll be able to do your mystery every turn like that and if you have a good critical rate, you can chaos all your opponents every turn, unless they are immune... Tenten will also help increase your critical rate

still you can interrupt them i think... In your lvl only immune squads you'll prob face are lm guys with roots, but that only lasts for 2 rounds so the next rounds you'll chaos them easily xD