It looks like hs may be what she needs. Like somebody else said one year grade skip won't solve the problem and at this point she gets mostly one on one with a teacher plus an extra boring work anyway.
Join TAGMAX mailing list. Curriculum is often discussed there. Check the homeschool buyers co-op. Look at EPGY if you can afford it. Some of the curricula have a free placement tests. It may be worth trying them even if you don't care for the curriculum itself (k12, Singapore Math, Saxon Math. You may also let your daughter choose what she wants to learn.
You cannot really do worse than school. I think that was Kriston's motto the first year. If you look at it that way you have nothing to worry about
For the record we plan on homeschooling DS5 next year.
