I would change overwrite protection from None to Full, and keep the overwrite recyclable media before scratch setting. Keep all the individual job settings as append.
I would set overwrite protection on media set#1 (2-tape jobs) to 5 days, append period to 1 day.
I would set overwrite protection on media set#2 to 10 days, append period to 1 day.
Quick erase the tapes the first time you use them with these settings. By the second week everything will be automatic, and you will not have to quick erase or move tapes into media sets again.
I would also keep a few scratch tapes in your library just in case you take a sick day, or forget to change tapes. With these settings they will never get used otherwise.