How much of the Qur'an is recommended to be read, to compete khatmah during Ramadan

It's Sunnah to make a complete reading of the Qur'an during Ramadan. And Jibreel would revise the Qur'an with Muhammad ﷺ every Ramadan. I remember being told at one point, in order to complete the Qur'an during Ramadan you should read a whole juz every day. https://islam.stackexchange.com/a/31426/43 However there are 30 Juz and between 29 and 30 days during Ramadan. How many juz (if any) is one recommended to read over day, if Ramadan might be 29 days? I know some companions would complete the Qur'an in 3 days, but I'm not yet able to do that.