D&D 5E - Balor vs Pit Fiend

// champion9b was generated using PHB standard array and variant human Fighter 5 with Dueling Style and plate armor + shield + longsword +1 and Heavy Armor Master feat
let champion9b() = Combatant(nameOf humanNames "Champion", (20, 14, 14, 10, 11, 8, 76), AC=18, Traits=[HeavyArmorMaster; ActionSurge; AthleticsProficient; ImprovedCritical], Prof = +4, Actions = [Action.Create("Melee attack", Attack [ Attack.CreateMagic "slashes" 10 [DieRoll.Create(1, 8, 6)] Attack.CreateMagic "slashes" 10 [DieRoll.Create(1, 8, 6)] ]) ], BonusActions = [ Action.Create("Second Wind", Healing (DieRoll.Create(1, 10, 9)), 1) ])
// archer9b was generated using PHB standard array and variant human Fighter 5 with Archery Style and studded leather and longbow +1 and Sharpshooter feat
let archer9b() = Combatant(nameOf humanNames "Archer", (14, 20, 14, 10, 12, 8, 76), AC=17, Prof = +4, Traits=[ActionSurge; AthleticsProficient; ImprovedCritical], Actions = [Action.Create("Shoot", Attack [ Attack.BestOf(Attack.CreateMagic "shoots" 12 [DieRoll.Create(1, 8, 6)], Attack.CreateMagic "headshots" 7 [DieRoll.Create(1, 8, 16)]) Attack.BestOf(Attack.CreateMagic "shoots" 12 [DieRoll.Create(1, 8, 6)], Attack.CreateMagic "headshots" 7 [DieRoll.Create(1, 8, 16)]) ]) ], BonusActions = [ Action.Create("Second Wind", Healing (DieRoll.Create(1, 10, 9)), 1) ])
let balor() = Combatant(nameOf ["Kolor"; "Koloss"; "Zentradi"; "Abnaxis"; "Gargamontor"] "Balor", (26, 15, 22, 20, 16, 22, 262), Prof = +6, SaveProficiencies=[Str;Wis;Con;Cha], AC = 19, Resists = [Lightning; Cold; Weapon], Immunities = [Fire; Poison], Traits = [MagicResistant], Actions = [ Action.Create("Multiattack", Attack [ Attack.CreateDualType "slashes" 14 ([DieRoll.Create(3,8,8)], MagicalWeapon) ([DieRoll.Create(3,8)], Lightning) Attack.CreateDualType "whips" 14 ([DieRoll.Create(2,6,8)], MagicalWeapon) ([DieRoll.Create(3,6)], Fire) ]) ])
let pitFiend() = Combatant(nameOf ["Abariel";"Benetor";"Benedict";"Imariel";"Abbadon";"Lucifer"] "Pit Fiend", (26, 14, 24, 22, 18, 24, 300), Prof = +6, SaveProficiencies=[Dex;Con;Wis], AC = 19, Resists = [Cold; Weapon], Immunities = [Fire; Poison], Traits = [MagicResistant;FearAura(21)], Actions = [ Action.Create("Multiattack", Attack [ Attack.CreateMagicWithRider "bites" 14 [DieRoll.Create(4, 6, 8)] (OngoingDamage(Con, 21, Unavoidable(DieRoll.Create(6, 6), Poison))) Attack.CreateMagic "claws" 14 [DieRoll.Create(2, 8, 8)] Attack.CreateDualType "smashes" 14 ([DieRoll.Create(2, 8, 8)], MagicalWeapon) ([DieRoll.Create(6,6)], Fire) Attack.CreateMagic "smacks" 14 [DieRoll.Create(3, 10, 8)] ]) ])