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.github.io/skillchain-calculator/
How it works:
Choose anywhere from 1-6 weapons (Slot 1-6)
Click any weapon skills you want to include/exclude in the Skillchain sequences being generated.
You can choose to filter your output, by including/excluding the Skillchain properties you want see in the Filters section.
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!
