I was on a pump but had a lot of problems with air in the line and reservoir so just went back on lantus and hum along. I took 30 units at 6 am and am also on low carb keto and IF and my sugars were fine (99-126) until 9 pm so 15 hours after lantus injection went up to 181. I have the Dexcom 6 so I am charting my sugars over 24 hours to determine how my body behaves with the lantus. Not sure about it but probably need a small dose at night.
I haven’t used a pump, but I do use Lantus and Novolog. I have published a diary of sorts with blow-by-blow descriptions of ups and downs, with a Dexcom G6 and injections. see http://chaeld5.dreamhosters.com/2020/11/09/days-of-a-conscientious-diabetic/
feedback welcome!