I think there is some very important information that is missing from the post and is necessary to fully understand it and all the necessary nuance behind it.
Kenpo Kid is referring to the “extra chest stat” that can be found in my minion guide. This is a theoretical calculation that tries to find the exact contribution of cunning and speed to chest farming.
A heavy farmer knows that the main limit to farm chests is that you eventually run out of keys and food to open them, so you have to stop farming. Minions stats help reducing this limitation, both by giving back keys (cunning) and by shortening the chest opening time (speed), and therefore food needed to open it ahead of time. However, there has always been some expeculation about what stat is best for that goal.
My “extra chest stat” tries to see which cunning/speed combination would be the most efficient in terms of allowing for longer chest farming (opening as much chests as possible), which can therefore be used to rank minions in terms of how good they are for this process. However, there are important things to take into account.
The “extra chest stat” basically calculates how many “extra chests” you would be able to open in a fixed period of time compared to a minion with 0 stats, assuming you are farming chests without stop and using multiple copies of that particular minion for it.
For example, let’s take a lvl 50 Zapling. Thanks to its 250 speed (-50% mission time), chests will take half time to open than with a 0 speed minion. Therefore, in the same amount of time you get to open twice the amount of chests. Additionally, thanks to its 100 cunning (20% bonus key), every 5 chests you will get 1 key (which would correspond to another extra chest opened), or averaging it you get 0.2 extra chest openings per chest opened. If you add both stats together, then you end up with an “extra chest stat” of 2.4 meaning that using this minion while farming chests will allow you to open 2.4 chests more than a 0 stat minion. So this means that, in theory, the higher the “extra chest stat” of a minion the better it is for faming chests.
However, this calculation is based on several assumptions and has some limitations, so let’s talk about all the nuance regarding this.
- First, it is based on an ideal scenario where variables have been simplified to make it much easier. The reality is much more messy; all in all it should still help compare the efficiency of different minions for farming purposes, but it is far from a perfect calculation.
- Second, it doesn’t take into account the time invested in getting the chests. When I talk about “extra chest” in reality I am talking about “extra chests you can open”. A free key is not a free chest, a chest slot that is emptied faster is not a free chest. You will still need to invest the time to win those chests. But I assume that whoever is interested in this is probably due to having enough time to get the chests but not being able to open them all.
- Third, it only works if the player is opening the chests as soon as they are unlocked or opening them ahead of time using food. If you leave the chests for some time after they have unlocked, cunning start to become the only relevant stat.
I hope that helps understanding what we are meaning when talking about minion “extra chest stat”.