So, I just realized that the Letter Ranking for certain things, parameters and such are kinds vague, so I'm adding an adjustment so people can get a rough idea of what each should be.

E: Value of 10. Capable of cracking cement or pushing a boulder easily. Beyond the realm of any normal human, no matter how long they train.
D: Value of 20. An attack from this servant is equivalent to beeing hit by a modern tanks shells.
C: Value of 30. Destroying a modern tank with a single blow is possible.
C+: Value of 60. Slightly stronger then A rank STR because of the modifier(Which adds its value to itself temporarily, under a condition.)
B: Value of 40. Picking up, throwing, or even destroying a semi truck is something considered easy.
A: Value of 50. The peak of strength in a Servant. Enough strength to destroy a house in a single blow. In three swings, a mansion could be destroyed.
A+: Value of 100.  At the level of a Demi-God focusing in Strength(Heracles and the like). Most likely beyond pure humans.
A++: Value of 150. A level of Strength only Monsters or Gods can reach. Humans cannot reach this level. Demi-Gods count as humans.
EX: Value of ???. EX implies that comparing it to something else is meaningless. In other words, it is above normal parameters.

If needed, feel free to adjust your parameters if you feel you undervalued or overvalued a skill.