I feel like this "series" you've got going should start with one well rounded and written file and then write tales with it, as scips really shouldn't be a series.
Why exactly can't SCP articles be parts of a series? This has been done numerous, numerous times before on this site and isn't something new. This is almost standard practice. And no, I will not write only tales after this in the series, that's neither how it should be nor something I want as a writer.
this feels closer to a Fifthist church scip than a sarkic one.
This article has nothing to do with Sarkicism. All of the runes and magic provided in this article are based on Sarkicism; the characters literally point it out by saying it is not Sarkic, but a system based on Sarkic magic - the article does not even have the 'sarkic' tag, meaning it has nothing to do with Sarkicism. Also, if I may ask, how does this feel like a Fifthist article?
I feel like you tried to throw too much into one file without properly fleshing anything out or connecting them all properly
Every single element in this article somehow connects to something else in it and makes sense. Every single element in this article is as fleshed out as I wanted to be for the current state of the story. You are supposed to be somewhat shaggy-doged at the end and wanting to go for more, which is provided.
Not to mention the regular break in clinical tone and the multiple SPAG mistakes.
Could you provide any examples of such? Just saying that without saying anything else is not constructive criticism.