Muramasa said:
I thought it was anything under B rank as far as Berserker goes.
Its A. But you have to remember that the ranking system puts a B+ weapon over a normal A. From Fuyuki:
Parameter Rules
Working under the basis that '1' is considered a normal value:
Rank Unmodified + (X2) ++ (X3) +++ (X4)
A 50 100 150 200
B 40 80 120 160
C 30 60 90 120
D 20 40 60 80
E 10 20 30 40
When a rank is marked with a +, it means that just for one moment, it is able to temporarily increase its damage two-fold, overcoming even a higher ranked weapon. Only a few heroes have + stats. Those with ++ are uber. Those with +++ are considered to be in a class of their own.
Weapons or stats with an EX rank do not fall under these parameter rules. Things that can no longer be categorized by the numbers of the above scale as they lie beyond them.
High thaumaturgy is considered to be at a rank of A. A+ spells are considered to be close to magic.
A C rank Noble Phantasm is the equivalent of an A rank or A+ normal attack (STR).
Ea's maximum damage is 4000, but with backup items in Gilgamesh's vault, damage can be increased even further.
Since even an E rank skill has positive effects, I'd say it's safe to assume that anything with a rank is going to be better than average.
A++ and EX level for Noble Phantasms are said to be close to Divine Spirit level attacks.
Ranks with "minus" (-) modifiers do exist; Kanshou and Bakuya, Archer's majutsu skill, and Rider's divinity. However, what that translates to in numbers is unknown.
Hm, a lot of strange interpretations are going on, but this is the way how I personally see it. For common ability stats, E = expert, D = ace, C = superhuman, B through A = beyond what a human being can accomplish/going to need some god/demonic/dragon/shinpi blood to get these kinds of stats. There are some other theories for this about how back then, in order to even survive people had to be stronger/tougher/faster. Well Bedivere did manage to run way faster than a normal modern human being could so it is possible.
Other than with NPs, + modifiers can be found in Berserker's STR, Rin Saber's LCK, Caster's MGI, Assassin's AGI (probably factoring in Tsubame Gaeshi). The only non-NP stat with ++ modifiers is Black Saber's MGI.