Awesome. Hope it works out for you. I've never done anything as intense/committing as Lib Ridge, so maybe some folks that have tackled the route can give some more insight to their fuel consumption if the use a canister stove.
I would definitely make sure you have a reserve canister. I would rather carry a few extra oz of weight than run out of fuel for water. Example...I always take a small titanium pot, 4oz fuel, and pocket rocket on my summit bids in case I need to brew up at some point.
Careful with the pocket rocket though, it can be a little unstable/top heavy compared to something like the whisperlite. It doesn't hold the wider base pots very well (msr stowaway 1.1L or similar). You will also get better performance from it If you can keep the canisters warm, and don't place them directly on the snow. Not always possible, I know. Other than that, it's a great stove.