I have been testing drop rates for the items, as well as the stacking of the effects, and after a few thousand kills, I can confidently say the following:
- Arquien's Necklace stacks additively with itself and Supplement Part Con, and multiplicatively with the damage bonus from a wind weapon. Sea Captain's hat stacking unknown.
- Drop rates stack additively.
- Drop rate of Candy is 20% per necklace.
- Drop rate of Candy Cane is 20% per necklace.
- Drop rate of Chocolate Drink is 1% per necklace.
- Drops are calculated on kill, not given by proc. ie, similar to Snowier, not Witch's Pumpkin hat.
Keep in mind that since Chocolate Drink is a relatively low drop item, it is easy for variation to influence the drop rate. That is why I also referenced the amount of Chocolate Drinks per Candy/Candy Cane, and with ~1700 Candy dropped, there were 5% as many Chocolate Drink, or 1/20. That corresponds well with the 1% drop rate per necklace.
Edit: I spent the last week grinding in Nogg Road with them on, but not eating any of the drops. I looted everything as best I could, but some were not looted. From this last week, I currently have 5176 Candy Cane, 5053 Candy and 379 Chocolate Drink. That makes the Chocolate Drink drop at around 7.5% of the rate of the candies. As they drop at 40% with two equipped, that makes the drop rate of the Chocolate Drinks approximately 3% overall, not the 2% I had originally assumed. So it looks like the Necklaces give a 1.5% chance each of dropping Chocolate Milk, rather than 1%.
Edited by Latsabb, 29 May 2017 - 04:48 AM.