So the issue is that the new frost DK artifact traits, Runic Chills and Thronebreaker got nerfed in the first 7.2 hotfix but the lastest nightly version doesn't account fot that yet. (latest test with b14254d build).
I noticed the issue by using an APL that only auto-attacks, cast Sindragosa's Fury and Obliterate and checked the interval at which the character casts Sindragosa's Fury. The interval showed 160s with 93 cristalline swords procs, which is way too low if said proc only reduced SF cooldown by 1s.
So the issue is that the new frost DK artifact traits, Runic Chills and Thronebreaker got nerfed in the first 7.2 hotfix but the lastest nightly version doesn't account fot that yet. (latest test with b14254d build).
Link to hotfix : https://worldofwarcraft.com/en-us/news/20653889 29th march part.
I noticed the issue by using an APL that only auto-attacks, cast Sindragosa's Fury and Obliterate and checked the interval at which the character casts Sindragosa's Fury. The interval showed 160s with 93 cristalline swords procs, which is way too low if said proc only reduced SF cooldown by 1s.