In terms of raw damage it's a little worse than a heroic class trinket on Demon fights (loss of Lightning Bolts seems v.noticeable + obviously Windfury damage), in AoE if it's hitting Demons I'd put it slightly above heroic, possibly even mythic Censer level. RNG obviously plays a part since 5sec is v.short when you're wanting the procs for the AoE bursts. Fights that Blademaster is working on for AoE it won't push out (i.e. Xhul/Iskar, first is only half demon second isn't so won't be anywhere near). Soul Cap blows it out of the water but it can work well with Soul Cap (proccing into a shift) etc. from my testing on it on Archimonde (parses below if you want to take a look).
If anyone has a parse of using it vs. using a heroic class trinket (preferably unupgraded) on similar kills of a boss I would apprecaite it. Still waiting on sims for now, not heard any news on that yet but been very busy today.
Talisman (
extremely good cap/ring procs which props up the parse a bit):
https://www.warcraftlogs.com/reports...done&source=15
745 Class Trinket:
https://www.warcraftlogs.com/reports...ght=2&source=7