Hmmm. I think you probably have to try some things & see how it goes.
For the night cycle, first off I would get some data before any dose increase. My instinct is that you are getting lower AMPSs now b/c he is seeing better #s in the nighttime cycle. I don't know if that is right of course, it is just a guess. When he has hit greens in the day he has not zoomed, so I don't think there is a liver training factor at play, so that says to me that at night something wonky is happening when you get a high # by the time of your AMPS. So I would definitely want data before raising the dose. Ideally at night I would go for a +6 and a +8 or so, something to give you some clue what the nadir might be, and when he is rising back up. Other data of course is useful also, like a +2 to check for an early drop, etc.
On the daytime cycle I'd be tempted to try 1.7.
Your AMPSs are so good now, I think if you wanted to you could experiment with going to maybe a +11 shot in the AM and +13 at night, and see how the PSs look on that (you are doing +10.5/13.5 if I recall?). Well even if I got the details wrong, I'm thinking if you wanted to you could take a small step to evening the timing out and see if the better PSs hold.
I do agree that deciphering the data is easier when the doses are equal, however I would really want some data on the night cycle before raising any there. I don't think you are seeing greens or the AMPSs would be lower, but then the whole AM timing thing is still a mystery with him, so who knows.