Boss: Goddess of Rhongomyniad (Camelot)

Boss Statistics

Altria Pendragon (Lancer): Chapter 17 (4/5) - 3
	HP	592,292
	LVL	80
	Class	Lancer
	NP Bar
	NP Type	AoE
	Actions	3 per turn
	Traits	Sky, Arthur, Dragon, Female, Humanoid, Sovereign, Riding, Altria (face), Servant, Weak to Enuma Elish

Passive		Increases debuff resistance by 17.5%
Passive		Goddess Rhongomyniad buffs herself with Charisma (lasts 2 turns) before the battle begins.
Skills		Increases own Buster performance by 50% for 1 turn
		Increases party attack by 18% for 3 turns
		Increases NP Gauge of self by 1, Removes own debuffs
NP Effect		Deals around 17,500 damage to all opponents, pierces Invulnerability, and charges own NP bar by 1.

The most lethal part of Goddess Rhongomyniad’s kit is by far her NP, which pierces through Invulnerability and Evasion buffs, and deals heavy damage to all team members. While Sabers may be able to survive the hit, it will take out a chunk of their HP pool.
While Defense buffs do reduce her NP damage, her Charisma buff means that you would need a higher defense buff percentage for it to be significant. Guts is a plausible defensive alternative as well.
Her normal attacks hit for around 2,000 for Arts and Quick cards, and around 3,500 for Buster cards. While it will hit harder against Archers and Berserkers, Saber-class Servants can take the damage without much worry thanks to their class advantage.
Regardless, stacking Defense buffs, attack downs and NP damage down can reduce her NP damage to manageable numbers.
Make sure to time defensive buffs such that they are active when she activates her NP, rather than her basic attacks. Her NP is is the most lethal part of her kit>
The Goddess’s NP charge skill may be used at any time - this may cause her NP to go off sooner than expected.
Her NP charging skill also removes any debuffs currently affecting her, which can make it harder for debuff-heavy teams.
She will always prioritize her NP, meaning that there is little worry of Mana Burst-infused NPs.
Goddess Rhongomyniad has a multitude of traits, making it rather easy to find a counter to her.

Most of the player’s team composition should consist of Sabers. Single-target Servants (Okita, Lancelot(Saber)), or those with supereffective modifiers against one of her many traits(Mordred, Siegfried), should be prioritized.
Berserker-class Servants are also an alternative, though their lower durability may pose a problem. They are liable to perish on any of her NPs
A couple of supports should be included, to increase the damage dealers’ effectiveness and/or help them survive the Goddess’s NP better. Mash's kit is particularly well suited to this encounter and the combination of her NP and her first skill can more than half the damage of the Goddess's NP.
Due to Rhongomyniad’s Invulnerability Pierce, more defensive Mystic Codes are not recommended. Aggressive options such as the Chaldea Combat Uniform, Mage Association Uniform and Anniversary Blonde should be used instead.

Altria Pendragon (Lancer): Chapter 17 (5/5) - 1
	HP	671,058
	LVL	90
	Class	Lancer
	NP Bar
	NP Type	AoE
	Actions	3 per turn
	Traits	Sky, Arthur, Dragon, Female, Humanoid, Sovereign, Riding, Altria (face), Servant, Weak to Enuma Elish

Passive		Increases debuff resistance by 17.5%
Passive		Goddess Rhongomyniad buffs herself with Charisma (lasts 2 turns) before the battle begins.
Skills		Increases own Buster performance by 50% for 1 turn
		Increases party attack by 18% for 3 turns
		Increases NP Gauge of self by 1, Removes own debuffs
NP Effect		Deals around 20,000 damage to all opponents, pierces Invulnerability, and charges own NP bar by 1.

Goddess Rhongomyniad has a larger HP pool as well as a higher level, the latter of which translates to higher damage.
She deals around 2,200 damage on Quick and Arts cards, and around 3,700 damage for Buster cards.
She no longer uses Charisma before the battle starts, but will cast her Protection from the End of the World in her first turn.

The most lethal part of Goddess Rhongomyniad’s kit is by far her NP, which pierces through Invulnerability and Evasion buffs, and deals heavy damage to all team members. While Sabers may be able to survive the hit, it will take out a chunk of their HP pool.
While Defense buffs do reduce her NP damage, her Charisma buff means that you would need a higher defense buff percentage for it to be significant. Guts is a plausible defensive alternative as well.
Regardless, stacking Defense buffs, attack downs and NP damage down can reduce her NP damage to manageable numbers.
Make sure to time defensive buffs such that they are active when she activates her NP, rather than her basic attacks. Her NP is is the most lethal part of her kit>
The Goddess’s NP charge skill may be used at any time - this may cause her NP to go off sooner than expected.
Her NP charging skill also removes any debuffs currently affecting her, which can make it harder for debuff-heavy teams.
She will always prioritize her NP, meaning that there is little worry of Mana Burst-infused NPs.
Goddess Rhongomyniad has a multitude of traits, making it rather easy to find a counter to her.

Most of the player’s team composition should consist of Sabers. Single-target Servants (Okita, Lancelot(Saber)), or those with supereffective modifiers against one of her many traits(Mordred, Siegfried), should be prioritized.
Berserker-class Servants are also an alternative, though their lower durability may pose a problem. They are liable to perish on any of her NPs
A couple of supports should be included, to increase the damage dealers’ effectiveness and/or help them survive the Goddess’s NP better. Mash's kit is particularly well suited to this encounter and the combination of her NP and her first skill can more than half the damage of the Goddess's NP.
Due to Rhongomyniad’s Invulnerability Pierce, more defensive Mystic Codes are not recommended. Aggressive options such as the Chaldea Combat Uniform, Mage Association Uniform and Anniversary Blonde should be used instead.