Priority of Modifiers

(Rule)
Description: If any value or roll is affected by more than one modifier, these modifiers are applied in a strict order, following table table/priority_of_modifiers. First apply modifiers listed with priority step 1, then apply modifiers with priority step 2 to the result, and so on (whenever you see the terms set/always/never used in bold in such a modifier, this indicates its priority).

When several modifiers within a priority step are to be applied to a value (e.g. a Characteristic value), apply them in the order that results in the lowest value.

When several modifiers within a priority step are to be applied to a dice roll (e.g. for Aegis Saves, to-hit rolls, to-wound rolls), apply them in the order that results in the lowest success chance of the roll.

After all modifications via multiplication, division, addition, or subtraction, unless specifically stated otherwise:


Agility and Attack Value cannot be modified to lower than 1, unless they were lower than 1 before modifications.

• The value of all other Characteristics modified to lower than 0 is treated as 0, unless it is used for another rule or effect that is subject to further modifiers (for example, a model part's Armour Penetration modified to -1 is treated as 0; but when it is used for determining the Armour Penetration of the model part's Close Combat Attacks, the corresponding modifiers will be based on the value of -1).

Armour cannot be modified to exceed a maximum of 6.

Agility and Discipline cannot be modified to exceed a maximum of 10.


Priority
Step
: Modifier
1 : Values set to a certain number and values set to another model's value. If the other model's Characteristic is modified, apply these modifiers before setting the Characteristic.
2 : Multiplication and division.
Round fractions up.
3 : Addition and subtraction.
4 : Rolls always or never succeeding or failing on certain results, and Characteristics always or never set to a certain value or range of values.


Priority of modifiers.For example, if a model is affected by (A) The model's attacks gain +1 to hit and (B) Attacks made with this weapon are set to hit on 4+, first apply modifier (B), since modifiers using the set mechanic are applied in priority step 1, and then apply the +1 modifier, as modifiers using addition are applied in priority step 3. The final result would be the model's attacks hitting on 3+.