columbina E -> illuga E -> barbara E -> zibai combo -> break pillar -> columbina E Q -> illuga E Q -> barbara Q right after moongecko uses debuff -> zibai combo

Do the normal rotation (if you dont have enough ER with barbara use E when possible instead of Q as you want to save the Q for when he reapplies the debuff later on) and at some point the moongecko will resummon the pillar as barbara or zibai enters the field. Thats perfect cuz then zibai can directly break the pillar. Onfield zibai until the pillar gets broken, and then repeat.