Re: Kitty 4/10 amps +6.5 ... HELP!
Ok, first .... deep breaths!!!
Next... you are checking regularly for ketones and they are negative, right? So that is the immediate worry, and that is under control.
#3... she is eating ok? That is key in warding off ketones.
If those things are under control, you can relax, breathe, and no need to panic. The rest of it will most definitely NOT be solved overnight, it takes time and patience, and there is nothing to panic over. (I know I'm a total hypocrite as I am a panicker, but I can still say it with authority

).
Insulin resistence: sorry, did NOT mean to freak you out. I use the term loosely, and I may even have the wrong term. I don't mean any big fancy condition, I just mean that with PZI sometimes they seem to get "stuck" so to speak in higher #s. When you see that, you just need more insulin to get through, and then often once you get a breakthrough you need to lower the dose and will still get good results.
Switching insulins: I would post in the Lantus and Lev forums and ask for opinions. There are a lot of former PZI users in both forums, and you can get some great advice both about PZI and about the Ls, and about what is best overall. Generally I would say if you have tried an insulin for a couple months and tried everything within reason you can and don't get good results, switching is a good choice. It's rarely a magic fix though - they often will sit in high #s for a few weeks on the new insulin as you go through the process of raising the dose. There are some shortcuts though, so if you do switch be sure to get advice on the most effective way to do that, and always be sure to mention she has a ketone history.
Going over 4u: I have not heard that, but it could be true. You could check any ProZinc studies, etc. and see if they talk about dosing by weight. I don't think you are at the point where we would consider her a high dose kitty, but you can always read the stickies in the High Dose forum and see what they say (but don't let whatever they say freak you out more!!!).
Specialist: My experience is that specialists don't have any special diabetes expertise unless they are actually diabetes specialists. If you know there is one in your area and they have been vetted by the board here

I don't think there's anything wrong with going if you can afford it and want to. It might bring you peace of mind. I think there are some who do consults with Dr. Lisa too, I'm not sure how that works, or where she is located. I wouldn't go to just any specialist though, make sure they are diabetes-savvy, and up-to-date with the latest thinking (i.e. there might be some who think they are diabetes savvy but aren't).