I can only speak from the standpoint of a DIY mum and CSSE exams: - leave the Bond VR papers as they're not appropriate for CSSE at this stage. By all means, use the English and the Comprehension books as a top-up, or for variety - we did. Bond Maths are very useful and their 10 minute tests are an absolute boon nearer the exam date. About 5 weeks before the test day, DD was working on the 12 - 13 Bond Maths and the "More Fifth Papers".
By this time last year, we had already started our home-cooked mocks every Sunday. You'll obviously run out of CSSE papers but we tried a mix and match of various publishers so that DD didn't get too used to any particular format. It was very important to develop her timing and exam technique skills - these sort the men from the boys on the day. Have a look at the thread I started on the Essex board - tips, tricks etc. I'm afraid it's stamina, stamina, stamina all the way.
As far as VR's concerned, you only have one CSSE familiarisation paper and it's the same one they've been churning out for years and years
We'd started working on Daughtrey's "Bright Sparks" and the Walsh 3-book series by this time last year. You can also try the IPS Daily Practice Books in VR and Maths - DD was doing those to keep her skills up to scratch - they mix up question-types so that DC's get a variation, rather than the same question types banded together.
DD2 put up her own timetable for Summer holidays
-Have a chat with your DD and see if you can gauge what sort of thing she envisages in terms of work and then perhaps you can come to a workable compromise that suits everyone, including siblings
There's no doubt she will need to do something but there's nothing worse than having to look at a sullen face for the entire 6 weeks
We were lucky that DD2 wanted it very badly and we had no moans tbh but I have no illusions - she's unusual.
One thing's for sure, one really does need to think about stepping it up a pace...or even three, about now, especially if going for CRGS, CoCHS, or any of the others' out-of-catchment places.