I think @dahe1031 is using screen-capture software to obtain the video, and there's always a risk of artifacts with that. Unfortunately, ripping the original stream directly is more complicated and the precise technique varies from site to site. I can't help with that either, since I have no experience with SapphireFoxx's sites. The current quality is probably the best we are likely to see in the near future. No complaints from me, they are doing their best.
I am not sure, but you can probably download the comic pages. If not, you can just screenshot each page. Put them in RAR files; I think someone has already shown how to do it. The missing comics I am aware of are: Seed of Sorceress and Very Trusting Finance 1-5.