I don't know to be honest, all I can say is what has and is working for me. I wear the phallosan for as long as I can/want to, so long as it doesn't affect with my daily life or annoy me too much. Like today I will end up logging around 20 hours. To be honest it is all guesswork at this point in time when it comes to phallosan, in relation to how many hours to spend in it, what tension to have it on etc.
When I am doing my manual work I will wear my phallosan in accordance with that. So, I try to do girthwork every second morning, so I will take the phallosan off around 2-3 am so I can get morning wood and do my girth work. My other manual work, stretching and jelqs do not get interfered with the phallosan so on days I am doing them, it does not matter if I do really long hours in the phallosan. I base the length of time on what kind of manual exercises I am doing, i.e. if girth work I will put in less phallosan hours before it so my EQ is ok.
I recommend taking 1 day off from doing any kind of PE or phallosan use, and 2 days off any kind of manual PE. So it would be ok in my opinion to use the phallosan for 6 days, which is what I do, but I try to have 2 days off from manual PE.
The idea of wearing the phallosan of red the day before your break is a good idea in my opinion, and it is sort of what I do too, give my dick a good workout before it can rest.
Hope this helps