I think I'd agree with moved's comments about you running out of papers
It's still very early days yet, so keep strong...both of you
As moved has said, it's a really good idea to focus on the areas where marks were dropped and practising one type each week, is a superb plan
We loved the GL Assessment "11+ Explained Verbal Reasoning" book. It covers the question types needed for the CSSE exam. It's beautifully presented, easy to digest, visually appealing and has games and quizzes for you to play, to build on the skills learned. It ticked all our boxes, especially as it was published by the same company who set the real test.
As a little exercise to diagnose any issues/problem areas, we used the IPS "Verbal Reasoning Additional Practice Questions Book C" The 12 questions are set by type, so you have a chance to do 12 "Type O", 12 "Type S" etc. They were invaluable.
If you need more resources to build up the intensity level for each question type, then you could always put in some "Bright Sparks" at the end of your learning - a progress marker, if you like
Although the Daughtrey books in the "Technique and Practice" and "Graded Papers" range cover more question types than are used (or generally have been used) for our purposes, you could pick and choose some exercises for her to try. Variety is the spice of life in the 11+ voyage and we tried hard to make sure DD didn't get bored of the same old question papers.
Don't forget that there's the IPS 10 minute, daily tests, too for later but they mix question types together.
I'm sure that much closer to the exam, you'll been wondering why you were worried and she'll be doing Walsh questions with confidence
We've all done it