See this would be true barring the fact that Proscriptor still wrote all the lyrics, laid down the drumming and was responsible for the majority of the riffs. On top of that, most of the album was written in the early 2000s and was just reworked a few years later.
See this would be true if it wasn't appallingly obvious that I wasn't referring to the lyrics. And Proscriptor receives absolutely zero credit for being "responsible for the majority of the riffs".*** I'm not sure why you would even have been led to believe that, since Proscriptor was never a part of the (musical aspect of the) songwriting core. Shaftiel was always the primary songwriter in the band and Proscriptor receives few writing credits musically. Shaftiel almost entirely wrote and composed Tara on his own. Proscriptor, for the new album, has already stated that "The songwriting undertakings were equally distributed between both Ezezu and Vis Crom and I must admit it brings an admirable multiplicity to the album as a whole."
***Here's a rundown of the writing credits for the "Musical Magick" aspect of each song:
Between the Absu of Eridu & Erech: Aethyris
Night Fire Canonization: Shaftiel
Amy: Zawicizuz
Nunbarshegunu: Aetyris and Vastator
13 Globes: Aethyris
...Of the blahblahblah: Zawicizuz
Magic(k) Square Cipher: Aethyris
In the Name of Auebothiabathabaithobeuee: Vastator
Girra's Temple: Shaftiel
Those of the Void Will Re-Enter: Aetyris and Vastator
Sceptre Command: Aethyris
Ye Uttuku Spells: Aetyris and Vastator
Twix Yesterday, the Day & the Morrow: Equitant
It also clearly states in the booklet that "All music composed/written by Aetyris, Shaftiel, Vastator, and Zawicizuz from 2002 to 2007". Unsurprisingly, "Night Fire Canonization" and "Girra's Temple" were the best songs on the album.