My basal/bolus ratios seem to vary between 70/30 (on days when I’m running high) and 90/10 (on days when I’m not) - seems to average out at 78/22 according to MySugr.
I’ve never used a calculation like that, I just went with the idea that if 10g carbs raises me by 3mmol, and 1 unit NovoSluggish drops me by the same amount because I’m on a 1:10 ratio, then that was a good place to start for corrections. I need more in the mornings, so I fiddled about and found that in the small hours/very early morning I need double that, tapering down to 2/3 as the morning progresses. So for early morning a unit drops me 1.5mmol; mid morning to early afternoon it’s more like 2mmol. Rest of the day it’s 3. I use a half unit pen, so as soon as I get to the mid sixes, I inject half a unit to nudge it down. I do a lot of it by intuition now, but I do have my scale printed out by my bedside for bleary eyes early morning corrections as the higher the BG is, the more I need to correct! I can just scan, read the number, inject what it tells me, and go back to sleep... no maths or thinking required.
I’ve only been doing this since I went VLC, so I don’t know if it would have worked before. It was the lack of carbs to contend with that enabled me to work it all out.