Hi Suki - Good to see you again over here!
I'm going to offer up my perspective of your numbers, and what I would do if I was holding the syringes.
I'm encouraged that you're seeing yellows. If you've looked at Grayson's SS, you know he "swam in a sea of pinks" for a couple months. Once we knew the "devil we were fighting" (Acro/IAA), it was much easier to push on aggressively. Once we finally switched over to Lev, we climbed the dosing ladder pretty quickly... I felt like we HAD to, as he had had issues with ketones, and I didn't want to risk DKA. With an IAA kitty, the key is to stay on top of the resistance. Let up a little and it will run over you and leave you in the dust. I consistently increased 20-25%. If you think about "normal diabetic kitties" we do 25-50% increases. I would stick with a 20-25% as long as you're still seeing numbers OVER 150 at nadir. At that point, I would be a little more conservative. (I think my heart stopped the first time I even SAW a blue!) I also increased every 3 days or so. Others, like Heather's Sneakers, took longer to settle in to a dose. She typically held the dose for a week. That part really depends on Crystal. You're going to have to take some cues from her to see how quickly you increase.
I was reluctant to use R at first. I eventually used it, and for Grayson, he pretty much didn't move for anything less than 3u... meanwhile others will hypo on barely a sniff. You're doing great by testing frequently after dosing R. In my opinion, since you're already seeing yellows, I would prefer to dose the Levemir aggressively and see what it will do, without the R. Some people will use the R on a sliding scale. Like >400; 1u; >350; .75; >300; .5u. Others will push it and even use R when preshot is <200. I don't believe I used R under 300 - and if I did, it was a lower dose. If you continue to use R, I would only use it at preshot. Lev's onset is usually about 4 hrs... by that time, the Lev has moved the BG down for the baseline. Grayson NORMALLY nadired about +9-+11. You don't want the two insulins to nadir at the same time, which is why I don't encourage a mid-cycle R.
With Acros, we often say "blues are an Acro's greens". We don't always push to have the low numbers, so in my mind, we're trying to reach somewhere in the 100-150 range during a cycle. If we can do better than that, great; but the goal is getting down to the blues.
You're still in the "IHOP" zone - in the US that's the International House of Pancakes. Grayson's cycles were very flat - like a pancake. Your numbers look a lot like his. It wasn't until about October 2012 that we started really seeing movement. Unfortunately, that meant we were climbing - up to the 50u max I shot, and 3u R. Fortunately that was when he really started responding (I didn't want to buy an even BIGGER syringe!). Other Acros have shot even higher doses. Frankly, that scares me... but then again, so did G's dose - particularly when you see other kitties dropping like a brick on .5u! While Grayson was guzzling insulin, my kitty Herb was microdosing... and Libby's Hershey came for a weekend and taught me about low numbers... that I'd NEVER seen with Grayson.
It all boils down to YOUR kitty and how Crystal responds. Right now I would continue to chase down the BGs with the Lev.
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Once his food costs started coming down, I was able to transition my other kitties and 2 pups to canned food.