To cite JK_3:
Is this related to https://www.warzone.com/Forum/528049?Offset=90#PostTbl_1157094 btw?
I already did a very in-depth example calculation in the linked thread that explains what to expect from this artifact. If you have any specific questions to the whys and hows then please ask them, but don't (to cite the bug report page) just state that something isn't working. What exactly is your problem with this specific artifact. Give us numbers that we can work with to either show you were you went wrong or where Fizzer perhaps miscalculated something. But, starting a rant about "the developers" will definitely help no-one.