This post will talk about 3 major topics.

1 = Calculation of "total power" for any attack skills
2 = Comparison between (M)ATK and (M)AMP, their significance
3 = <exciting?> How to estimate the damage done to your opponents (mobs and especially other players)!!

(brief) DISCLAIMER :
Again, I am playing Cabal Taiwan,
and here I assume all these calculations also work in other Cabals.

------------------------------------------------------

1. Total power of an attack skill

This is not very important,
because you don't need to really calculate it everytime.
But I still need to talk about it ~
as this will be the prerequisite for topics 2 and 3 !!

Now let's get to the point ~

Have you ever noticed,
whenever you launch an attack,
there will be a bracketed number next to your (M)ATK value ??

For example you will see:

ATK 924(2377)
MATK 472

or

ATK 924
MATK 472(1048)

This bracketed number is the "total power" of that attack ~
at least this is what I called.

To calculate this is easy,
here is the formula:

Power = ATK x (Skill.AMP + Other.AMP) + Extra.ATK

Other.AMP is something like AMP you get from your gear/equipment, and/or AMP from buff skills such as Blader's +25% Sword-AMP.

For example,
my ATK=924 MATK=472
my Sword AMP from my gear is totally 18% ( = 0.18 )
Blade Cry Lv.19 ( AMPx1.80 ATK+548.2 )

then my power for Blade Cry is
power = 924 x (1.80 + 0.18) + 548.2
power = 2377.72

We have to truncate (cut off numbers after the decimal point)
(that means to round it down but NOT up)

that's why the bracketed number (2377).