Well, I did re-adjust the rating for some items in Kavacham. I managed to spawn in my first Heavy Pavise with no cheats.
I had to keep them uncraftable, because my mod has so many of them.

(Part 2)
If this made no sense, I recomend checking out these sites:
https://wildermyth.com/wiki/Equipment
https://wildermyth.com/wiki/Drop_rates
They explain everything I have said here in more detail.

Long story short, you could change the tier of your weapon to 1 for increased chances, but it may not appear anyway, or maybe making it craftable to guarantee acquiring it.

@Robur (Part1) The way Wildermyth generates loot tier is determined by what chapter you aquire them in. In the file "\Wildermyth\assets\data\loot\missionSpoils" it says what tier that can appear in which chapter and its chances. Here it says that tier 3 weapons (and armor) can only appear in chapter 3 with increased chances beyond chapter 3. If the weapon is an artifact weapon the chances are even lower, but increasses everytime you get a non-artifact item.

So, if your weapon is specifically designated to be tier 3 it can only appear as mission loot in chapter 3 and beyond, but it also might not appear at all because of just bad luck. I tried to get around this by making all the weapons tier 1 (but with tier 3 stats), that way they can appear in chapter 1 and beyond, increasing the chances. However, the chances are still pretty low so I am considering just making them craftable.

Hey I have a question about spawning items.
Can you tell me if Wildermyth spawned your Tier 3 items in game as loot? my Battlemage Pack has a powerful Tier 3 battlestaff, but so far I have not seen it spawn (it is very, very powerful). I neeed to know if I just need to be patient, or if I need to make some drastic changes to Tier designation.

Awesome!

Very fun idea for a mod! I was a big fan of the fable games growing up, I can't wait to use some of these :)