I would adjust your intra workout nutrition to better suit your insulin usage. Optimally, you want to use a mix of hydrolysates (casein + whey) or hydro whey if budget is tight. If you can't afford that, then i'd stick to isolate + bcaa/eaa's.
Here is the best insulin protocol I've seen as of late, designed by Mike Arnold.
45 minutespre-workout: 15 IU Humulin R.
20 minutes pre-workout: 50 grams Branched chain cyclic dextrins. 20 grams non-denatured hydrolyzed protein. 20 grams Glycerol monostearate. 3 grams Leucine. 5 grams Micronized creatine monohydrate. 2 grams Beta alanine. 3 grams Taurine. 500 mg Potassium. 1 gram Vitamin C.
60 minutes after 1stshake: 50 grams Branched chain cyclic dextrins. 20 grams non-denatured hydrolyzed protein. 3 grams Leucine. 5 grams Micronized creatine. 2 grams Beta alanine. 3 grams Taurine.
60 minutes after 2ndshake (the workout will likely be finished bynow): 50grams Branched chain cyclic dextrins. 20 grams non-denatured hydrolyzed protein. 3 grams Leucine.
Personally, i dumbed it down due to excessive costs and pin 45min preworkout, then sip on a shake of 100g dextrose, 50g hydro whey, 5g leucine, 10g creatine. I eat a low fat meal 2 hours before working out and after working out, eat anther low fat meal.
You can add glutamine to any insulin protocol to reduce the amount of carbohydrates you need because glutamine regulates blood sugar levels. So if you're trying to keep carbs lower, add 10-15g of glutamine to a shake and try 7g/iu and then 5g/iu of bcd's or dextrose.