I see what you are saying, but you also need to understand that the longer you stay in high numbers, the higher the risk for DKA as well as developing glucose toxicity.
Personally I agree on 6u as well, but you hold the syringe and have to be comfortable with it. There are very few guarantees with insulin, but as Kris echoed, you are way way off from being in hypo territory and you need to get rid of these blacks -- that is the only way I felt comfortable giving a recommendation, with no test strips in reserve, of increasing the other day. That is something we almost NEVER recommend. If you want to do this as an experiment and want to stay where you are for now, then you must be super diligent on ketone tests and food/water intake and jump up on the very next shot if anything degrades.
So let's get a check in on everything else. When was the last ketone test and what was it, how much food is he getting per day (on his own, and syringed), and is his course of clavamox complete now? I'm sorry that I don't remember the original purpose of the clavamox but based on what kind of infection it was for, can you tell if the symptoms have resolved?
I am just trying to assess the other components that help contribute to DKA. DKA is ugly ugly stuff to be avoided at all costs and we would hate for you to be facing that again. Ketone tests are critical, food is critical, water is critical (and of course enough insulin is critical). I personally don't think of DKA as something you tiptoe into. I think of it as a cliff you fall off of, where getting back up is way harder than it was to go down (just my own analogy, btw).
I don't want to frighten you and I absolutely don't want you to feel bullied. You all are doing SO well that I want you to realize how lucky* you are to get to the point that you are at now, but also to know you aren't out of the woods yet. We are all pulling so hard for you. I said I thought about Simba all day, and I am not exaggerating even one bit.
* Clearly "luck" had nothing to do with it, you all have worked your butts off on caring for and loving this little guy, and all we can do is give our recommendations and experiences.