There is a very clear rule about when the player needs to roll a humanity roll. If you kill someone in the heat of passion, your humanity drops as low as 3, if you kill as a planned murder, your humanity drops as low as 2. This means a vampire whose job is to kill or eliminate threats, would eventually be stuck at humanity 2. For example, if a vampire's job is to eliminate mortals or vampires who break the masquerade, there is no doubt that this act would be considered as planned murder and should require a humanity roll for characters above humanity 2.
Maybe a vampire is running a criminal organization which involves killing those who resist their organizations agenda. even the vampire himself doesn't commit the act of killing, he surely could order other mortals to kill innocents for the sake of his agenda.
Maybe a vampire is a Lancae Sanctum crusader who sees other supernaturals as demons or threat to vampiric society and purges them. since other supernaturals are also sentient beings and can be considered human, killing them would surely fall on the spectrum of a planned murder.
Maybe a vampire is an enforcer for an elder, and the elder regularly asks to "take care" of someone or "burn down" places of his enemies. effectively this would put the humanity of the enforcer very low. unable to conduct business with mortals.
What I'm trying to say is with these rules most of the iconic characters and vampiric concepts are doomed to stuck at very low humanity, but in reality they don't seem to be that distant from humanity in novels or they have high humanity in SAS adventures. What is the reason of this difference? are NPC's exempt of these humanity rules? or are there any other reason they manage to keep their humanity so high? (it sure is a hell of a xp sink)
Did any of you use house rules to for example make an act immune to humanity rolls (after maybe losing humanity for that specific act) because that is what the player does, its his job. Or do you effectively forbid players characters to be involved in some concepts that would definitely sink their humanity to 2-3, whereas NPC elders enjoy higher humanity with no consequence.