Here’s how “increased chances” works, using nuggets as an example:
- With no preferred item (and all items possible in that level), each item has an equal chance, 1/3 (33%) of all 4* crafting mats
- In Season 1, or Season 2 normal, the preferred item gets a double share, 2/4 (50%) of the 4* crafting mats, and each of the non preferred gets 1/4 (25%)
- In Season 2 Hard, the preferred item gets a triple share, 3/5 (60%) of the 4* crafting mats, and each of the non preferred gets 1/5 (20%)
- Season 1, Province 5 is a special case, only getting nuggets, so they are 100% of 4* crafting mats
- Season 1, Province 6 is also a special case, only getting nuggets and dragon bones, so each of them gets 1/2 (50%) of 4* crafting mats there.
The double/triple thing works the same for all crafting and ascension mats, adjusted appropriately if there is more than one preferred item in a type/star level class, and with common herbs being special in that they are present 4x the amount of any other 1* crafting mat, and 8x or 12x with “increased chances”