Conclusion: the order of "what do you flip" is as such (the stuff towards the end takes precedence): tailor (flip whatever role you were suited as) -> no-reveal (flip nothing) -> janitor (flip nothing) -> oracle (orc target always flips role, unless suited - then they flip suited role)
Mechanics testing: A janned celeb will *always* flip celeb, even in no-reveal setups. / A janned oracle will not flip oracle, but the orc target will become naked. / A janned oracle who self-orc'd will flip oracle, even in no-reveal setups.
I propose that the dead gets a message, similiar to "You received a suit!" This message would be "You have been hit to head with a shovel!" This would be useful only if the target survives.
If mafia kills someone who gets culted/yakked or masoned and Janitor uses his night action on them. then he only finds out they were mason if they got masoned or cultist if culted or normal mafia if yakked and this means he cannot claim their first role before they changed sides. I got lucky when it happened to me as Janitor because someone suicided. http://www.epicmafia.com/game/400201