Attack multipliers are based on the class multiplier for your weapon. If you
have a short sword equipped, your base multiplier will be 1.4. For
Greatswords, 4.8. So on, so forth. Please refer to the class multiplier
section to find your appropriate value.

There are five separate types of attacks that will stack. You may choose one
attack up multiplier from each of the categories to stack separately. If you
choose, for example, a demondrug and a mega demondrug, since they are from the
same class, you will only see the increase from the larger of the two values.
Using a Demondrug (x3) and a Mega Demondrug (x5) will only yeild a total of x5.

Example: Great Sword with 960 attack

Powercharm: 4.8 x 6 = +28.8
Powertalon: 4.8 x 9 = +43.2
Kitchen Attack (S): 4.8 x 3 = +14.4
Demon Flute: 4.8 x 10 = +48.0

ORIGINAL ATTACK POWER = 960
TOTAL STACKABLE ATTACK = +134.4

NEW ATTACK POWER = 1094

Decimal damage is only dropped when calculating your damage. The decimal
attack power remains hidden in case another attack up is added.

=========================
1: Powercharm Category
=========================
Powercharm: Class Modifier x6

=========================
2: Powertalon Category
=========================
Powertalon: Class Modifier x9

=========================
3: Demondrug Category
=========================
Kitchen Attack Up (S): Class Modifier x3
Kitchen Attack Up (L): Class Modifier x5
Demondrug: Class Modifier x3
Mega Demondrug: Class Modifier x5

=========================
4: Might Category
=========================
Demon Flute: Class Modifier x10
Might Seed: Class Modifier x10
Might Pill: Class Modifier x25

=========================
5: Armor Skill Category
=========================
Armor Attack Up (S): Class Modifier x10
Armor Attack Up (M): Class Modifier x15
Armor Attack Up (L): Class Modifier x20

Weapon class multipliers are as follows:

Bowgun: 1.2
SnS: 1.4
Lance: 2.3
Longsword: 3.3
Greatsword: 4.8
Hammer: 5.2
Switch Axe: 5.4