Couldn't see anyone do that so did it myself. Now we can safely say that every Son's level can be beaten on Full Combo (though I probably won't record Normal "BloodMoney" FC because I hate that level).
All of my Seizure recordings are lagging for some reason, I wonder if Low-Latency recording modes'll help me with that. Here I decided to export the video with constant 60fps, because that looks slightly better than with variable 30~60.
Also while taking a stroll I suddenly realised that "She Swallowed Burning Coals" started to bore me a bit so custom tracks were used instead (which were mostly taken from "I wanna be/kill the ..." fangames).
Music:
AzuliaXectyer - Hello Vermilion (Main level theme);
Bloodborne - Hunter's Dream (Level clear);
MaestroRage - "_-={Dark Skies}=-_" (Score summary).