Hi and howdy! First off, putting this out that I am not an expert here. Both my diabetic cats went into remission in 2 months time. So I don't have lengthy experience.
Are you following the SLGS or TR method? They have different numbers to not shoot under.
With a history of keyetones, I personally would shy away from no insulin at all, as you really want to keep your baby from having ketones. If nothing else, you can always knock it down to what's referred to as a token dose of 0.5 units.
I believe even the TR said new to insulin no-shot is 90, but I would worry about the ketones.
Are you testing for those at home? If not, they have something called Ketostix. They're real cheap and easy to use. Sounds awful, but leave the top off the litter box, and once the kitty starts peeing, reach the stick behind and under the bum to get it in the steam. They can't stop once they start, so you're good there.

You also might see some bouncing when they hit good numbers. After being high so long, when they dip into more normal numbers one hour, it can send their bodies going... Whoa! What the heck is this!?!
And it has a reaction of kicking out more insulin, not understanding yet. My boy did that a lot at first. 80's, then 300+ in a few hours. It's frustrating to watch, but it's just what happens some times.
Is your kitty on a low carb diet? And do you have medium to high carb foods in case the numbers drop too low/hypo?
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