I play the build with Bane of ahjad-den and Secheron fury set on PS5
Bane of ahjad-den aspect is not working in Helltides. It just stays on 0 and cooldown is not renewed, damage is drastically reduced
Is it a bug?
I concur that Ahjad-Den does not work when The Third Blade is equipped. Equipping a different weapon while already inside a Pit does not resolve the issue, although I have not yet tested this behavior in a Nightmare Dungeon.
If you start the activity with a different weapon equipped, Ahjad-Den functions correctly. However, equipping The Third Blade afterward causes Ahjad-Den to stop working.
Additionally, if you are specced into Spares, Mighty Throw (MT) should normally trigger at 2 stacks, but with The Third Blade equipped, MT does not trigger. In fact, after testing all of the Mighty Throw upgrade paths, none of them appear to function when using Ahjad-Den with The Third Blade.
Interestingly, manually casting Mighty Throw activates all Mighty Throw specializations except Spares, indicating that the issue seems to be specifically related to the interaction between Ahjad-Den, The Third Blade, and the automatic Mighty Throw triggers.
And yes, it does not work in Helltide with any weapon.