I'm also cutting and I take 100g of dextrose in my PW shake :D oh and I'm about 185 at 5' 9
there is no set formula, but I would up your dextrose to 70 and drop the protein to 35.
You can also use chondroitin. Often this and glucosamine are mixed together.
I get mine at Costco. 500mg Glucosamine/400mg Chondroitin per tab. Good stuff