Ralrra, I am almost caught up on my cutscenes! My goodness, that's a crapload of cutscenes! And lots of running.
I found that, when you get to collecting the memory fragments, it's easiest to stop in Jeuno & pick up the items you need first. Wasabi/vinegar/basil can all be bought in the Tenshodo shop at the back of Neptune's Spire in Lower Jeuno; lilac from M&P's market in Upper Jeuno; philosopher's stones were going for 5-10k @ AH when I got mine.
Beyond that, one of the more time-consuming parts was waiting for the game day to change after planting the philosopher's stone in that spot in Witchfire Glen in Grauberg. I started my cutscene just after 0:00 and had to wait the full game day before I could continue.
I also finished the final CS before the fight itself, so I just need to go back to Walk of Echoes and do the actual fight. The only question now is which one of us gets to be the Fourth Spitewarden.