In cooke, you will be riding from town 7k, up to 10k, with the majority of riding being in the 8000-9500 ft. range.
What do you currently have in your sled for a helix and springs?
I would leave gearing as is.
You are going to likely end up in the range of 68 or 65 gram primary weights. If you have the 44/40 helix in there, you may want to switch to a 40/36, or straight 36 degree helix. I have a few 36 degree helixes that would work if you need one sitting on the shelf.