FFXI Skillchain Sequence Generator

Hello!
I was tired of people causing problems in Sortie F Boss, but I also wanted people to feel comfortable bringing any DD/Prime Weapon combination to Sortie. I figured the only way to solve this problem with 100% certainty is to write a sequence generator for FFXI skillchains: https://fel-ffxi.gitlab.io/skillchain-calculator/ (URL updated: 2026/10/24)

How it works:

1. Choose anywhere from 1-6 weapons (Slot 1-6)
   

2. Click any weapon skills you want to include/exclude in the Skillchain sequences being generated.
   

3. You can choose to filter your output, by including/excluding the Skillchain properties you want see in the Filters section.
   

In this example, let's assume we're doing F Boss, so we want to avoid Detonation, Impaction, Fragmentation and Light.

Let's say our party is using these 4 weapons, Great Axe, Club, Dagger, Sword:



Then, I click WSes our party wants to use: Disaster, Ruthless Stroke, Black Halo and Savage Blade:



I choose to filter out the skillchain properties that I don't want to make:



and we can see what skillchains we can make, using each weaponskill once:



Alternatively, I can choose to include them and we see no Skillchain sequences match the filter. This means that no sequence of Disaster, Ruthless Stroke, Black Halo and Savage Blade will produce Detonation, Impaction, Fragmentation nor Light:



This was fun to build. Also, this tool has helped me to fix some of the Skillchain properties in Windower's resources: https://github.com/Windower/Resources/blob/master/resources_data/weapon_skills.lua

Any and all feedback is welcome!

Here's some feedback for you:

This ***'s amazing, great work. Definitely something that the game/community has been needing for a long time. I was working on a similar project but never got too far with it because formatting the output was a mess.

Thank you man, I appreciate your kind words! Personally, I needed to teach myself skillchains because I could never recall them as quickly as other players. I think it's a fascinating game mechanic, even if it is strangely designed. (Fire-based SCs get more extension opportunities for example).

As far as this tool goes, I can modify it further if someone has an interesting need or worth-while use case, or even just a Weaponskill-specific question that needs to be answered. I am not completely sold on the UI/formatting (AI helped in that regard), but I feel like it's functional, without hurting performance.

Funny thing: I was going to export all of the skillchain combinations for offline calculations, but the sheer explosion of possibilities is was a lot more than I anticipated. (Whomever designed FFXI skillchains as a game mechanic, deserves a medal seriously).

Thanks again for the kind words. It's appreciated!

I made some changes based on earlier feedback:

Copy/Share URL: Example: Click me to see some skillchain sequences!(URL updated: 2026/10/24)
You can now copy/paste URLs to share with your party or friends. Only one person in a group needs to do any clicking in the UI. The rest can simply view the URL to see which Skilchains a person is considering.

Skillchain Graph (new)
A new interactive graph card shows all your weaponskills as nodes with colored arrows representing which skillchain type results from each pair. You can drag nodes to rearrange the layout, scroll to zoom, and click a node to highlight its chains. A color-keyed legend sits below the graph. The graph respects all active filters, so it updates live as you adjust your party, weapon skills, or result filters. You can even drag/drop this graph to get a better view of the Weaponskills you're considering. (Edit: This is a WIP, and while it is accurate and works, you might still prefer the Text output, shown on the same page).

Element icons on SC types
The Skillchain Filters checkboxes and the Graph Legend now show the element icons for each skillchain type — so Fusion shows Fire + Light, Distortion shows Water + Ice, etc.

Chain Length filter:
The situations where skillchains can repeat indefinitely has been fixed and can be filtered via a new Chain Length filter. They can be 2/3/4-step or infinite skill, which are as follows:

Level 2: Fusion → Gravitation → Fragmentation → Distortion (any starting point, any rotation)
Level 1: Liquefaction ↔ Scission, Scission ↔ Detonation, Transfixion ↔ Compression
(This is explained in a hover tooltip on the ∞ Infinite filter button, when clicked).

Any and all feedback welcome.

I applied some hotfixes:

1.) You can filter skill seqeunces displayed in the output and graph, by number of Steps, including Infinites (i.e. Transfixion <-> Compression).

2.) The filters that you choose become URL-Enccoded, so you can click "Copy Share URL", and you'll be able to see exactly what someone chose: This is a list of all Scythe weaponskills that make Level 1 infinite skillchains. (URL updated: 2026/10/24)

Here is the output for that URL, if anyone is interested:



The graph is interactive and should updated automatically with your filter choices.

Edit: I still to add Pet Abilities, Avatar Blood Pacts, Blue Magic and Scholar Immanence Properties. The flavor text in each card could also be made a little more relevant.

Some more updates/Bug Fixes:

URL: https://fel-ffxi.gitlab.io/skillchain-calculator/(URL updated: 2026/10/24)

Logic Updates:
Infinite skillchain detection corrected
Steps filter always visible — The Infinite button is now always shown in the Steps filter.
URL sharing now preserves filters — Copied share links correctly restore the Steps filter and Skillchain Result filter selections when loaded in a new window.

Skillchain Graph:
Legend moved above the graph.
Arrow Labels — New dropdown in the graph legend to label arrows with: None (default), Skillchain Level (1/2/3), or Skillchain Name.
Label Position — New dropdown to control where on the arrow the label appears: Midpoint (default), Near Head, Near Tail, or Rotated/Parallel to the arrow.
Arrow label settings saved in shared URLs — Arrow Labels and Label Position selections are now included in share links.

Example #1:
Level 1 Infinite Skillchain diagram with All Marskmanship WSes(URL updated: 2026/10/24):



Example #2:
1H WAR/BST Level 2 Infinite skillchain requires 1 REM:(URL updated: 2026/10/24) (Sadly, 1 player can't do Onslaught, Bitz, Primal Rend, at the same time).



I don't think anything shown here is particularly new to anyone who knows how to calculate skillchains manually. However, if anyone has any Weaponskill/Job related questions, let me know. We can answer them through the combinatorial explosion that is calculated/shown above.

I've added the ability to click on any dynamically generated Skillchain sequence and have it be highlighted in the graph window. I also labelled the starting WS as well:



Edit: If you want to see the above GIF in action, check it out here. (Of course, you can also make and play with your skillchain sequence, too).

Hi folks,
Apparently, Github doesn't let humans have more than 1 registered account, so I moved my Skillchain calculator and Haste Calculator to Gitlab:



(new URL!) Skillchain Calculator: https://fel-ffxi.gitlab.io/skillchain-calculator/
(new URL!) Haste Calculator: https://fel-ffxi.gitlab.io/haste-calculator/


Skillchain Calculator (updated 2026-10-24):

1. Added a circular arrow to indicate when a skillchain repeats (infinite).
   

2. Here is a screenshot of a level 2 infinite skillchain that repeats from the first Weaponskill (Death Blossom):

   

3. Here is that same skillchain shown in the directed graph. The dashed arrow is meant to show where the repetition happens:

   
   

4. Here we see another infinite skillchain (level 1), that repeats from the second weaponskill, and only that portion is highlighted in blue text. Again, the directed graph shows a dashed line where the skillchain repeats. It is a circular path, so the repetition can happen anywhere, but FFXI requires you to START a skillchain first:

   
   

Haste Calculator (updated 2026-10-24):

1. Defaulted Equipment Haste to 26%.
   

2. Added a Copy Share URL button!
   

3. Here is an example of a Haste configuration that a DRG/SAM might use: (Haste 1, Honor March, with Hasso), that shows main job or sub job Haste Samba will cap the DRG's combined Haste to the maximum value of an 80% reduction. (So I guess the DNC can just do Steps, and not waste TP on Sambas?)

   

   (To see for yourself, click the link and choose either Haste Samba (no Merits means sub-job DNC) and 5/5 merits means main DNC. You'll that both reach 80% cap).
   

I hope this helps / makes sense to folks. Let me know what you think or if you have any recommendations.