You can find the items required for anything if you start the script with those quests selected, and check the logger; it will print all required items in logger after it opens bank for the first time and will also print missing items and quantities shortly after that
Still working on it, not in testing yet
I'm afraid I'm not currently doing trials
Yes, Regicide, no ETA atm
What's printed in the logger? (top right corner under Settings -> Toggle logger)