Lindsay:

First, let me say that you are on the right track using the Anderson brothers’ book as a guide for training for rock climbing. Steve and I consider it the best rock training book and the equal of ours in its depth of approach.

Great question and Mariner is right to link that article that Steve wrote. As I’m sure you’ve heard me say too many times both here and in TftNA book. It is a really challenge to increase your capacity in different realms at the same time. Its why we probably won’t see someone climb 5.13 on an 8000m peak. To train for these two disparate abilities will take a lot of time and the two systems being trained are almost diametrically opposed so they are not complimentary (meaning training for one will not transfer much if any to the other). This is why athletes in conventional sports specialize. What I’ve found over the years is that its best to periodize when you have divergent qualities you want to train.
So, your idea of using an extended transition period where you focus in rock climbing while doing maintenance mountain endurance work will be a very effective approach I think. Remember the bicycle riding analogy: Once you have built the capacity for a certain type of work, it is much easier to maintain it then it was to build it in the first place. After this 4 mont rock focus you may find you can mesh the rock and mountain training pretty well with a program like Steve’s advance Alpine rock training program.

Also 11 pulls ups is anything but weak, especially for a woman. I’d say that this is a fairly good representation of a good basic strength level and your rock climbing is probably not being held back but that. You’ll need to look for other areas to improve your leading grade. Moving to 15 pull ups prob won’t net you as much as working on finger strength on a hang board.

Your 1000′ box step is also pretty solid.

Keep thinking the way you are.

Scott