I was back reading a thread titled "Chant du Cygne worth it for BLU?" its a 3yr old thread and was mostly talking about the WoE sword, not Almace, it was just interesting to see the replies from a couple of people back then, compared to what they would say now, given the same question.
Tbh, in abyssea on most things you can just spam spells with almost infinite MP due to meds/atma. So depending on atma, and maybe outside abyssea old content I would say its only a toy for most part. I know someone on my server has it, they did decent dmg on a EM gigas outside the WOE.
and also.
It's Light/Distortion. I wouldn't bother.
I picked these 2 out because I see these guys as the main voice of the BLU community and it's interesting to see how their position on CDC changed so much from when it first came out to now.