Okay.
Saber:
- Fate: At least City level (Can fight against Lancer and deflect blows from Berserker), at least Mountain level (Split a cloud), likely Large Mountain level (The earlier feat was performed while Saber was low on mana; a fullpower blast should be much stronger) with Excalibur
- Unlimited Blade Works: Mountain level (Comparable in strength to Berserker, who can destroy mountains), Large Mountain level with Excalibur
- Heaven's Feel: Mountain level (Superior in strength to her normal self, easily cut through God Hand), at least Large Mountain level with Excalibur Morgan (Superior to regular Excalibur)
Archer: At least
City level (Can parry attacks from Saber, Lancer, and Caster), up to
Mountain level with Hrunting and Caladbolg II / Unlimited Blade Works (Comparable to Gilgamesh's Gate of Babylon, presumably used to kill Berserker six times in
Fate).
Lancer: At least
City level (Can fight on par with Saber),
higher when summoned in Europe (Would have strength on par with Saber at her peak and Berserker), with the Soaring Spear that Strikes with Death (Broke through all seven layers of Rho Aias, though this may be because of a battle of concepts), and with runes (Has a small chance of winning against Berserker).
Rider:
- Shinji: At least City level (While weaker than she should be, she's still comparable to other Servants), higher with Bellerophon
- Sakura: At least City level (Comparable to Saber and other Servants), at least Mountain level with Bellerophon (Overpowered Excalibur Morgan alongside Shirou's Rho Aias)
Caster: Mountain level (Overpowered Rin's gems easily, which can take a life off of Berserker, and can punch through Saber's Magic Resistance with her stronger spells. Her weaker
Prisma Illya counterpart intended to annihilate Fuyuki City).
- No "higher" necessary, these feats are just higher end Mountain level.
Assassi: At least
City level (Fought on par with Saber and Archer, can barely redirect blows from Berserker, and can kill Saber with Tsubame Gaeshi).
True Assassi: At least
City level (While he would lose against virtually any other Servant in combat, this is more just because he's not a straightforward combatant. Can briefly hold his own against other Servants in close combat).
Berserker: Mountain level (
Can destroy a mountai and deflected a weakened Excalibur and weapons from the Gate of Babylon),
higher with Nine Lives
Shirou Emiya:
- Fate: Wall level (Stabbed Kirei with the Azoth Sword), at least Mountain level with Caliburn (Killed Berserker seven times over with one strike).
- Unlimited Blade Works: Wall level, at least City level with Kanshou and Bakuya (Barely parried blows from Archer and Kuzuki, cut off Gilgamesh's arm), up to Mountain level with Unlimited Blade Works (Comparable to the Gate of Babylon, which was able to easily kill Berserker).
- Heaven's Feel: Wall level, at least City level with Kanshou and Bakuya (Duplicates Archer's strength and managed to lethally injure Saber Alter in a Bad End, though he broke his mind and died in the process), Mountain level with Nine Lives and Excalibur Morgan (Killed Berserker with Nine Lives, destroying 80% of his body instantly, and destroys the Grail with Excalibur Morgan in the Normal End).
Rin Tohsaka: Wall level (Her magic output is far superior to Shirou and Kirei's),
Mountain level with gems and prep (Took a life off of Berserker using multiple gems and managed to counter Caster's magic). At least
Large Mountain level with Jeweled Sword Zelretch (Destroyed multiple Shadow Giants with a light that
matched Saber's Excalibur)
- The comparison of the sword and Excalibur was before she even used Welt Ende.
Sakura Matou: Wall level (Despite her virtually limitless magical energy, Sakura's output is only equal to Rin's),
Unknow with the Shadow, at least
City level with Shadow Giants (A single Shadow Giant is comparable to a Servant's Noble Phantasm; Lancer's Soaring Spear that Strikes with Death is average in destructive power for a Noble Phantasm).
Kirei Kotomine: Wall level (Can casually snap trees in half),
much higher with mantra boosts (Can grow strong enough to defeat Ciel and True Assassin)
Souichirou Kuzuki:
- Base: Wall level (Can keep up with Kirei and Bazett)
- Amped: At least City level (Can overpower Saber and deflect Noble Phantasms from the Gate of Babylon)
Avenger:
- Servant: At least Wall level (Claims to be the weakest Servant and has E-rank strength; however, even the weakest Servants are much stronger than humans). Unknow against humans (Although the weakest Servant otherwise, he is said to be the strongest when it comes to killing humans, on par in killing ability with Primate Murder and ORT, capable of killing even a hypothetical human stronger than any Heroic Spirit).
- The Shadow: Unknow
Saber: Mountain level (Can fight on par with Lancelot, who has A-rank strength), at least
Mountain level, likely
Large Mountain level with Excalibur (Superior to her Excalibur in
Fate/stay night).
Gilgamesh: At least
City level (Comparable in strength to other Servants, but rarely fights in melee), up to
Mountain level with Gate of Babylon (The Gate of Babylon's strongest treasures can easily kill Berserker). At least
Small Island level with Enuma Elish,
Planet level with full power Enuma Elish
Lancer: Mountain level (Fought on par with Saber, superior in firepower to Cu Chullain)
Rider: At least
City level (Comparable in strength to other Servants),
Mountain level with Gordius Wheel (Nearly knocked out Berserker with a single charge),
higher with Via Expungnatio (Superior to his normal charges).
Caster: Wall level (Physically pathetic by Servant standards, but still much stronger than humans), up to
City level with summons (In large numbers, his summons can threaten Servants, and the Gigantic Horror can swallow up all of Fuyuki City).
Berserker: Mountain level (Has A-rank strength, comparable to that of Heracles, and fought on par with Saber),
higher with Arondight
Assassi: Wall level to at least
City level (His strength varies depending on how many bodies he's divided into; at his strongest, he is comparable to other Servants, though unsuited for direct combat, while at his weakest, he is only stronger than humans).
I'll work on the rest later.