Thank you very much for playing my WAD, Helm! I really appreciate the feedback, btw. Now, for why the Super Archies didn't appear for you, I have no idea what happened. I used the DECORATE file to define the Super Archvile, replacing the Arachnotron as I never used that monster. I was planning on using regular Archviles in the level, but I never got to do so due to time constraints. The Super Archvile should have the custom sprites that I made for it, but it appears that that was not happening in your playthrough. My only guess is that somehow the DECORATE file is not being loaded as expected. After all, I tested this with a now old version of GZDoom, g4.0.0. I will get a fresh install of the newest version and playtest it again.
Now onto the other issues. At the beginning where the lost souls were not allowed to pass through the door, that is intentional. I forgot that lost souls do not add to the kill count, and so I made the linedef monster blocking so that the player would be able to get 100% kills. Looking back on it, I should have not added that as it kills the whole encounter's fun. Oh well, hindsight is 20/20.
I saw that when you were going down the "cliff" area into the exit back into the hub area, you backed into the portal, teleported to the hub area, you then, before you crossed a linedef that closes the portal, ran back into the portal, and then teleported to the beginning of the stage. Now, that could be an error of mine as I did not place the linedef close enough. As a result, you reentered the old area and got softlocked. I will be also fixing this soon, and I will post the update here when it is ready.
Again, thank you very much for the playthrough as it really helped bring some game-breaking and odd bugs into the light. Again, thank you for enjoying my level, and btw here are some screenshots from a new level that I am working on. Building off the first area of FFF, I fleshed out into its own area. Let me know what you think!