Calculator:Combat/Instability

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Templates
Templates used
Calculator:Template/Combat/Instability

Notes

Many sources contribute to the critical hit chance of an attack for Magic. These include (non-exhaustive list):

  • Forced critical hit sources
  • Natural critical hit chance of an ability or auto-attack
  • These typically take on a range between 5% and 13.5%

If tick 1 is considered to be the tick when the player casts the Instability special attack (50 ticks remain on the bar), then tick 2 is when the initial hit fired from the staff lands on the target (49 ticks remain on the bar). Though it is possible to have a hitsplat land on tick 1, it does not cause an auto-attack to be fired if it crits. Therefore, the first tick possible for a given hit to cause an auto-attack to be fired is tick 2, when there are 49 ticks remaining on the bar.

Furthermore, the time between when the player casts the spell and when the auto-attack lands affects the pace at which auto-attacks are fired from the staff. This in turn sets a maximum number of auto-attacks that can be fired from the staff, given the amount of time left on the buff when the player lands their initial hit. The (collapsed) table below shows the time in ticks between the cast and the hit landing on the target.

Combat spell speed
Spell speed - The amount of ticks a Magic auto-attack takes to land after cast
1 tick = Fast, 2 ticks = Slow, 3 ticks = Slowest
Type of auto-attack Lands[note 1] (X ticks after cast)
Cast 1-4 squares away from target[note 2] Cast 5-7 squares away from target[note 2] Cast 8 squares away from target[note 2]
Burst Smoke Burst icon.pngShadow Burst icon.pngBlood Burst icon.pngIce Burst icon.png 1 1 2
Barrage Smoke Barrage icon.pngShadow Barrage icon.pngBlood Barrage icon.pngIce Barrage icon.png
Rush Smoke Rush icon.pngShadow Rush icon.pngBlood Rush icon.pngIce Rush icon.png 2 3 3
Blitz Smoke Blitz icon.pngShadow Blitz icon.pngBlood Blitz icon.pngIce Blitz icon.png
Exsanguinate Exsanguinate icon.png
Incite Fear Incite Fear icon.png
Aurora Opal Aurora icon.pngSapphire Aurora icon.pngEmerald Aurora icon.pngRuby Aurora icon.png 2 2 2
Strike Air Strike icon.pngWater Strike icon.pngEarth Strike icon.pngFire Strike icon.png
Bolt Air Bolt icon.pngWater Bolt icon.pngEarth Bolt icon.pngFire Bolt icon.png
Wave Air Wave icon.pngWater Wave icon.pngEarth Wave icon.pngFire Wave icon.png
Surge Air Surge icon.pngWater Surge icon.pngEarth Surge icon.pngFire Surge icon.png
Divine Storm Divine Storm icon.png
Storm of Armadyl Storm of Armadyl icon.png
Polypore Strike Polypore Strike icon.png
Slayer Dart Slayer Dart icon.png
  1. ^ Includes area-of-effect properties of spell.
  2. ^ a b c 1 square away is melee distance (often called MD or md).
template = Calculator:Template/Combat/Instability
form      = instabilityCalcForm
result    = instabilityCalcResult

param     = critInit|Initial hit critical hit chance (%)|30|number|0-100,0.01,0.01||The critical hit chance from the initial attack.
param     = critAuto|Auto-attack critical hit chance (%)|30|number|0-100,0.01,0.01||The critical hit chance from the auto-attacks fired from the Instability special attack.
param     = ticks|Time remaining on buff bar (game ticks)|49|int|0-49||The time remaining on the buff bar for the special attack in game ticks when the initial hit lands on the target. The buff lasts for 30 seconds (50 game ticks).
However, if a hit lands on the cast tick and is a critical hit, it will not cause an auto-attack to be fired. Therefore, the earliest tick that a hit can land is the next tick, when the buff has 49 ticks remaining.
This allows for a maximum of 50 recursive auto-attacks for fast magic spells, 25 for slow magic spells, and 17 for slowest magic spells. param = speed|Select speed of spell|Slow|buttonselect|Fast,Slow,Slowest||The speed of the spell affects how quickly a recursive auto-attack follows the previous auto-attack. For fast spells, a recursive auto-attack follows 1 game tick after the previous auto-attack. For slow spells, it is 2 game ticks. For slowest spells, it is 3 game ticks.
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Template documentation
This documentation is transcluded from Calculator:Combat/Instability/doc. [edit] [history] [purge]

Description

The purpose of this calculator is to calculate the expected number of auto-attacks fired from the Fractured Staff of Armadyl special attack, Instability, given the probability that an initial hit will land a critical hit and the probability of the subsequent auto-attacks landing critical hits. In addition, the spell speed of the auto-attacks are taken into consideration, as well as the time of the buff provided by the special attack on the player's buff bar.

Initial hit critical hit chance (%)

The critical hit chance from the initial attack. Values can be between 0-100 in increments of 0.1.

Auto-attack critical hit chance (%)

The critical hit chance from the auto-attacks fired from the Instability special attack. Values can be between 0-100 in increments of 0.1.

Time reamining on the buff bar (game ticks)

The time remaining on the buff bar for the special attack in game ticks when the initial hit lands on the target. The buff lasts for 30 seconds (50 game ticks). However, if a hit lands on the cast tick and is a critical hit, it will not cause an auto-attack to be fired. Therefore, the earliest tick that a hit can land is the next tick, when the buff has 49 ticks remaining. This allows for a maximum of 50 recursive auto-attacks for fast magic spells, 25 for slow magic spells, and 17 for slowest magic spells.

Select speed of spell

The speed of the spell affects how quickly a recursive auto-attack follows the previous auto-attack. For fast spells, a recursive auto-attack follows 1 game tick after the previous auto-attack. For slow spells, it is 2 game ticks. For slowest spells, it is 3 game ticks.