I stopped playing this game until it was complete as having to re-do the grind with every iteration was mind-numbing and starting from scratch through the Act selection was not at all helpful. The walkthrough on the OP was helpful up until the end of the fourth act and defeating the queen for the first Endgame. After that...
The walkthrough becomes irrelevant as certain required actions which have changed in the game from previous versions are no longer relevant. PRIMARILY - MC MUST go to the second level of the Archives through the Portal A SECOND TIME to retrieve the spider amulet from the chest. The Evil Irith quest is REQUIRED to finish the Goblin King quest, Gwynn's Institute quest and the Belt Mastery research. There is no hint of this in game which breaks the flow of the game into haphazard sections of grief and frustration while the player searches endlessly for the one action that will allow them to continue. Once the Evil Irith quest is finished, MC now has the location of the Mistveil Burrows and the ability to access the institute for Gwynn's Demonologist ending. This is the ONLY way to give Gwynn her demonologist outfit as, contrary to the in-game directions, IT CANNOT BE RESEARCHED. Kind of like Nyx's Milking request which was robably only inserted for her humorous reply. I really missed Gwynn's Demonologist outfit in the Goblin King ending.
I am, on the whole, very pleased with this game. I prefer tiny women and this game is right in my wheelhouse. However, more planning was required to allow multiple endings and maintain the game's 'natural' flow without requiring a restart or save-game manipulation. That and descriptions for the locked gallery items would have made this a five-star game. My opinion, of course. I look forward to the next game in hopes that the developer has learned from their mistakes.