Help for elderly kitty with failing kidneys

My kitty is nearly 20 years old. She has been in kidney failure for quite sometime.

I am feeding her a mixture of raw turkey, raw livers, oatmeal, veggies, including parlsey, (lightly steamed) and a renal supplemental powder I mix in with everything.
I also give her MSM, a vitamin supplement (Basic Instinct), gogi berries and some acidolphius now and then.

I am not hydrating her anymore, becuase I could not deal with needles and after a year was still having problems getting the flow going. It was too stressful for both of us.

What else can I do for her? She is still showing no signs of organ failure, but has been throwing up the past several days...mostly fluids with a bit of undigested food in it. She also pees on the carpet a lot this past year.

But she has not lost any weight in the past year, is alert, and has a good appetite.