Xenoblade Chronicles 2 1.3.1 New Game Plus - 25 million + zero orb chain attack damage

Thanks to Smalt for suggestions regarding Nim. This setup shows the maximum possible damage in a zero orb chain attack: 25 million+. This follows my usual rules of no pouch items, start from empty party gauge, and normal difficulty. This is not a generic superboss setup. Herald does 16 million+ damage, QTpi does 5 million+ damage, and Kos-Mos does 4 million+ damage. Battle strategy: Build up party gauge and do a Lv1 special. Pray to RNGesus for a break and set off AI Lv2 special at about the same time. Time the topple so that it hits just BEFORE the Lv2 ends, so that the Lv2 registers AFTER topple for the damage up fusion combo. Then start chain attack and hopefully have enough topple gauge to do the chain attack. Loadout: Tora: Lv99, all weapons arts at Lv5, filled both affinity charts, critical symbol, burst symbol, and beta scope (fusion combo makes up for loss of optical headband and NG+ break buff is not consistent). QTpi: S+, Moon matter chip, master muscle mod, earth core (easier blade combo with Nim and does more damage than light core due to Tora's justice level stuck at 4), AC Arts Boost V, AC Recharge Boost V, AC Critical Up IV, Specials Lv1 Plus V, Challenger V, Pinpoint Weakness V, AB Vital Charge V in Slot I, II and III are blank, Affinity MAX Atk V, Vendetta V, and Into the Ground V. QT: S+, Sunlight chip, Master muscle mod, dark core, AC Critical Up V, AC Recharge Boost V, Affinity MAX Atk V, Vendetta V, AB Vital Charge V, AB Vital Charge I in II and III slots, Pinpoint Weakness V, Critical Restore V Alpha: S+, Dilaton chip, Master ether mod, ice core, AC Arts Boost V, AC Critical Up V, Damage Heal V, AB Vital Charge V, AB Vital Charge IV, AB Vital Charge I, Block Rate Up V, Ultimate Shield Zeke: Lv99, all weapons arts at Lv5, all idea levels at 10, filled both affinity charts, burst symbol, optical headband, and graphite greaves. Herald: S+, Tachyon chip, Affinity MAX Atk V, Outdoor Attack Up V, Specials Lv1 Plus V 4 star ether cannon ATK common blade with 24% ether mod: S+, Tachyon chip, Affinity MAX Atk V, Hunter's Chemistry V, HP Attack Boost V (Hunter's core and ether mod is what matters here) 3 star axe ATK common blade with 24% ether mod: S+, Tachyon chip, Affinity MAX Atk V, HP Attack Boost V, Critical Up V (ether mod is what matters here) Nia: Lv99, all weapons arts at Lv5, all idea levels at 10, filled both affinity charts, burst symbol, critical symbol, and optical headband. Kos-Mos: S+, Tachyon chip, Blade Combo Boost VI, Titan Hunter V, Affinity MAX Atk V Nim: S+, Tachyon chip, Fusion Combo Up V, Shoulder to Shoulder V (Nim boosts fusion combo damage greatly; shoulder aux core to help with affinity) 3 star animal HLR common blade with 24% ether mod: S+, tachyon chip, affinity MAX Atk V, Shoulder to Shoulder V, Hunter's Chemistry V (ether mod is what matters as well as the affinity buff aux cores) Notes: 2 critical symbols = 100% criticals during chain attack. 2 Hunters / Shoulder cores will help get affinity right away for starting blades. 3 burst symbols increase chain attack damage. Damage caps for Herald was barely reached.