I think I can get by with 7-8, but like many here I rarely get that much when on anything above 10 mg pred (currently 20) due to pred-insomnia. Once in a while I'll pop an oxocodone left over from a dental procedure years back, and it helps me get a solid night's sleep. The more active my UC is, the more I have a constant level of fatigue and brain fog. I will go and fight my way through it at the gym, and the endorphin release froma good workout will help me nap later, sometimes.
I also notice that if I have waves of fatigue to the point that my eyes want to close, that is a warning sign I am going to start flaring upwards the next day. I'll blast some exra-probiotics or even pro-actively bump up the pred a little sometimes to nbip it in the bud.
Pancolitis dx'd 1986, full med-free remission 88-97
Flaring or simmering ever since
10 20 mg pred, 100 mg Imuran
Probiotics (mainly Primal Defense)
Turmeric/circumin, various vitamins/minerals,
Low-carb version of Specific Carb Diet