You need to understand that what you are hoping for is advice based on not enough data, and we won’t be able to give you that. Most people here aim for tight regulation, which means keeping numbers between 50 and 80 most of the time on a human meter and shooting low preshots. As Wendy says, we adjust dose based on how low the cat goes on a number of cycles — not just one — hence the spreadsheet which allows us to have a good multi day view of the situation. We don’t do things this way for fun, but because this method has been demonstrated to be the most efficient AND SAFE way of dosing Lantus. Chances are people are not going to want to advise you to do things they fear is unsafe.
Lantus does not like shot time changes. I’m assuming you are living alone and don’t have a friend/neighbour who can come in to test/shoot when needed?
I was away 11.5 hours a day when regulating Quintus, but I was lucky that my schedule was regular. If it hadn’t been, and if Quintus hadn’t gone into remission so fast (another upside to attempting tight regulation: over 80% chances of remission if you do it in the first six months), I might have considered switching to Prozinc. All insulines work best on a regular schedule, but some are more forgiving than others, and Lantus is not one of them.
You might want to check “start low, go slow” (there’s a sticky), which is a dosing method largely based on doing a curve a week to adjust the dose. Regulation may not be as tight as with TR but it might give you some helpful guidelines. But it won’t help you regarding changing shot times, and I personally have no experience with that to share.