I have watched this video that was posted here a while back and there are a couple issues with it, most notably getting caught (0:48) and also sprinting (0:41) which, even though nothing happened, I wouldn't recommend anyone imitate without knowing the effect.
(0:14) No point in sneaking at this point as none of the npcs are even hostile which, unless you go around caving people's heads in maybe with a big stick, won't happen until entering the back area of the bank. (0:38)
(0:28) No gain from sapping a guard that is so stationary it doesn't even even look around. Not to mention the guard had already woken up by the time he got back (1:03)
(0:33) Unecessary sapping again of completely stationary guard right in front of another guard. Pansy ass wooden door, still being an actual door which always have a tile height of 4 when closed, may have just prevented catastrophe.
(0:40) Sapping a completely stationary guard that never looks behind him. Letting the guard return to his original position would have been much safer, due to the spot behind him never being directly in front of any npcs view at any point.
(0:41) Sprinting, which sets $game_player.scoutcraft to -12 (value shown in save preview) regardless of anything else. This value is only updated once per second and, while it is technically possible to sprint inbetween updates, if you miss the timing then every nearby npc will be able to see lona.
(0:42) Sapping patrolling guard that cannot be sapped until past the vault (or it will block the way) at which point the distance to the vault is so short that sapping doesn't offer anything over the much safer alternative of throwing rocks which don't lose speed when thrown from stealth
(0:48) Spotted by walking right in front of noer citizen staring from accros the counter without sneak, which is something not even a moot wearing sur armor face paint and max dirt can get away with. At least use a rock to make them look away for a second or something before walking back.
(1:08) At this point, assuming the temporary MoralityDown effect has gone by, as (unclearly) indicated by the portrait a few seconds earlier, morality should have been at 25 and thus something had to be done to get past the guard, but personally i would have just thrown a rock. I don't know what it takes to safely sap npcs without repercussion, maybe someone can enlighten me, but afaik there is no rng involved in throwing rocks.
Below is a recorded attempt of my own. Talking to guards in order to show they're not hostile (anymore).
View attachment basic stealth.mp4
If anyone wants to rob the bank on doom, which is basically just hell only far more unforgiving and 1cc challenge (assuming no backups of save file), then maybe it's better to focus less on finding the perfect way to rob the bank and be more concerned with having a backup plan or two in case of failure. In the end I think that's what doom is all about. DDasar
mentioned npcs not being able to open doors which I think is very noteworthy.