Interesting headcanon. I always thought that she would be turned into slime as well. Though, now that I think about it, I'm not sure if she's organic. I think the biggest problem here is the duality of the sun, and that we don't know what happened to it.
Because of SCP-179, we know that the sun is both the inanimate celestial object (since hydrogen fusion is still detectable; perhaps Sauel Is in the core and that's why it isn't possible to detect him, meaning that both sides of the so-called duality are actually one) and Sauel. This raises the question of what would happen to Sauel if the sun was affected as a physical object (i.e. Turns into a red giant, expands and consumes planets in its path, not really echoing the life-giving agenda now that I think about it) or what would happen to the sun if Sauel was affected as a "living" thing (I assume killing him is easier than destroying the sun but I might be wrong).
On top of that we have the question of Sauelsuesor's biological status and whether or not she would be affected by what happened to the sun; additionally, the questions of what exactly happened to the sun (I always assumed it was something external that was applied to it, which means Sauelseusor wouldn't approve, but who knows), and of whether or not what happened to the sun affects planets other than Earth, are also required for us to understand how to integrate the two SCPs.
I get that information is omitted from entries in order to enhance the horror and stress elements that the tales inside bring out, but it makes the integration of all-affecting all the more difficult and confusing.
Also, sorry for the poor state of my inquiries and hypotheses. Sleep cycle modulation leads to dips in writing quality, it seems.