I cleared Mortal Journey once on stream, but charmless and demon bell is a whole different journey. I'll see people do really well with Yasha sugar and sure, trying to emulate those strats might make for faster clears, but I found myself having a better time just taking it a little safer with Ako's sugar instead. Work on my own skills slowly instead of trying to compare myself to those that have put in hundreds or thousands of hours. Also, I found out I quite like flame vent for Owl and Isshin. Never really utilized it in my playthroughs.
0:00 Gyoubu Oniwa
2:53 Lady Butterfly
5:18 Genichiro Ashina
8:22 Guardian Ape
11:44 Corrupted Monk
13:14 Great Shinobi - Owl
17:36 Headless Ape
20:15 Emma, the Gentle Blade
21:22 Isshin Ashina
24:37 True Monk
27:43 Owl (Father)
34:49 Demon of Hatred
42:50 Genichiro, Way of Tomoe
44:07 Isshin, the Sword Saint
48:20 Inner Genichiro
53:22 Inner Father
58:29 Inner Isshin