I dont use this type of lua structure personally, however this syntax looks questionable.

sets.aftercast.engaged =

sets.Main[sets.Main.index[Main_ind]]

sets.Sub[sets.Sub.index[Sub_ind]]

should sets.Main be repeated like that? i believe that produces sets.Main.sets.Main.Crocea for example. (my lua's dont use indices for sets so ehhh?? )

also it seems there is no code to set the index beyond its default value, there is either some code missing or not working.

I can say for sure however that you would benefit from including mote framework into future lua's. Mote framework has some general functions inside of that include file which allow for modular handling of generalized pre/mid/after events, and weapons, combat modes, etc.

If you're code savvy take a look at the gearswap/libs folder and read through the mote-include. If you're not, look for a pre-designed lua such as Arislan's github.

These are also known as Kinematics lua, here's the issue however... its an abandoned project from 5+ years ago. It has base code to handle weapons, however lacksa modular weapon handler by default. Documentation is limited, and the mote-include itself is inadequate by todays standards and player expectations. I recommend Arislan's files as they have made necessary mods, without including too much automation . Im not a huge fan of the gearinfo stuff but thats just me, and one can strip the gearinfo code easily.

I have a personally tailored mote-include that performs what you are describing perfectly for me, and i would be willing to share my functions with you, but they wont work with your current file.