Let's say, that there was a way to bot without players being able to report you for a certain reason. So the bans would all go down to auto-bans, flags and GMs looking into your play time and checking on you. Would this mean that you can bot 24/7 without getting banned for a long long time, considering using SINGLE account to draw as less attention as possible?
That depends. Does your account get flagged if you are playing X amount of hours in a certain amount of time? If it does, then you're screwed.
there is definitely a timer of some sort for dungeon farming, at least from my experience. Most get banned at about 12 hours straight farming.
Well, this is al theory of course.. but you could still hit some flag and get banned, we don't know what could trigger it, there were several cases where people tried some sort of botting where getting reported was VERY unlikely and they still got banned.