I'll take a shot at this one too.
Obviously the 3u was too high to start and gave a long cycle on day 1. Can't tell what happened on day 1, other than the PMPS was higher, but not "bouncy high".
Data for day #2 is missing, but I'm assuming 3u continued. AMPS on day 3 almost too low to shoot, and I would have advised a reduction that morning. The cycle gave a nice green in the middle, so it didn't go "too deep", but went too long, making a shot that night not possible.
No insulin for 24 hours? And a nice low yellow AMPS on day 4.
Wouldn't want to continue 3u with that record, but not sure if I would drop all the way to 1u as the new "normal".
I would probably recommend 1u on a PS between 200 and 300, and then advise 1.5u or 2u if over 300. I would try to get green nadirs because the one on day 3 didn't seem to cause a bounce to me. I'd try to maintain momentum because with this limited amount of data, I think "OTJ" is a good possibility in the not too distant future.
If that were to continue, I would lower the "no shoot" line to 150 with a small dose like .5u
Carl