Strange Retainers Swarm Subjugation Battle

Quest Overview

At the start of the battle, the following effect will trigger:
- Cage of Cherishment: Inflict Damage Taken Up by 1,500 for all [Hominidae] trait Servants. Apply Damage Cut by 500 to all [Demonic Beast] trait Servants. All effects include the backline [Permanent, Unremovable].
- Ibuki Douji [Serious Mode]: Apply Debuff Immune, 10 Critical Stars per turn, Invincibility against enemies' NP (3 times) and Increase Critical Star Gather Rate by 6000% for NPC Ibuki-Douji. [Permanent, Unremovable]
- Dobrynya Nikitich [Great Warrior]: Increase NPC Dobrynya Nikitich's NP Strength by 50%. Increase her NP Strength by 50% after she defeats an enemy. While on the field, increase all allied Servants' DEF by 30%. [Permanent, Unremovable]
NPC Ibuki Douji: Lv90 NP5 10/10/10; CE Lv20 Empty Garden.
NPC Dobrynya Nikitich: Lv80 NP3 8/8/8; CE Lv20 Empty Garden.

Part 1

Guest Servant: Ibuki-Douji

Fatal Battle 1/1
Enemies	HP	Lvl
Yaga - Bronze Saber Battle Start: Beast's Command [all effects are Permanent, Unremovable]: Increase ATK by 20% for all allies (including backrow). Apply Evade to all allies (2 times). Apply Sure Hit to all enemies and allies with [Wild Beast] trait.	59,864	51
Duō Duō Yì Shàn Tank - Gold Archer Battle Start: Close The Door To Catch The Thief: Apply Skill Seal to all enemies (1 turn). Inflict Order Change Seal on all enemies (3 turns) [Unremovable].	102,724	36
Kali - Bronze Berserker Battle Start: Contagious Fangs: Decrease ATK by 50% (3 turns) and NP Gain by 50% (3 turns) for all enemies [Unremovable].	60,885	56

Battle 2/2
Enemies	HP	Lvl
Cerberus - Gold Rider On Entry: Smouldering Gunfire: Apply buff to all allies [Unremovable]: When taking damage, decrease DEF by 10% for the attacker (1 time, 2 turns). Increase all allies' NP Bar to MAX.	219,592	36
LWB-M8 Battle Start: Heartless Slaughter [all Permanent, Unremovable]: Apply Guts to all allies (1 time, 10,000 HP Revival). Apply Ignore Invincible to all allies. Decrease damage by 70% vs [Invincible] targets for all allies. Nega Weapon (Small): Apply 20% Special ATK vs [Hominidae] trait. Decrease own DEF by 20% against [Demonic Beast Servant] trait.	173,690	39
HWB-M8 Battle Start: Embodiment of Violence [all Permanent, Unremovable]: Increase own DEF by 30%. When attacked by a Noble Phantasm, remove the latest 3 buffs from the attacker. Nega Weapon (Small): Apply 20% Special ATK vs [Hominidae] trait. Decrease own DEF by 20% against [Demonic Beast Servant] trait.	243,742	54