Oh Cindy, I was in your position just about 6 weeks ago, and I remember it like it was yesterday!! (((Cindy))) I know it's so hard to watch these numbers that won't seem to budge, especially because you have had such success with PZI. I think it's even harder to come from an insulin which has worked for you than from one you're exasperated with.
It will work. Mousie will turn a corner and you will start seeing good numbers. I was told, and Buzz proved them right, that with Lantus it kind of happens all at once. I was looking for at least gradual improvement, like a cycle in yellow instead of pink and red. I thought if Lantus were working, it would show me something! However, wise voices here in LL told me that all of a sudden one day, Buzz's numbers would break and things would start to get better from that point on. It started a little bit on 1/30 and then on 2/5 BAM, it was pretty from there on out (more or less; she is still in LTS after all). Buzz started on Lantus on 1/9, so it was 21 days before I really started to see any relief, and 26 days before I saw anything regularly happening.
All this is to say, I know how difficult it is, especially when you have PZI at the ready. Please do give it a chance; I really think you will be happy with it (and you know how much I loved PZI, so I understand where you're coming from).
If you are really stressed about the high numbers, maybe you could ask about using R until Mousie's numbers start to come down? I don't know about it, but I have read it as a suggestion for folks before, so I know it's done in some cases.
Vent as needed, and try to hang in. We're all rooting for you and Mousie!
ETA: The normal time before a dose increase is 6 cycles (3 days). However, I will let someone more experienced answer for your specific case just in case there are circumstances of which I'm not aware.