If you want to investigate some deep water soloing on limestone it might be worth checking out Block-up Gorge on the Shoalhaven. The cliffs are about 80m high and get very slaby at the top but there could be some good climbing up to ledges or roped climbing to the top. I remember thinking there maybe some limited deep water soloing on the Northern side. I never tried anything there as I was always paddling down from Horseshoe bend so had no boots or time.
Access is through Bungonia NP (but before the entrance gates) down a track between two farms (look for the old fuel tanks on the RH side of the hill), go though a few gates heading left at the forks until the track ends at Tressels trail. Walk down the big hill - 15minutes to the river (superb camping). Block-up gorge is about 20minutes easy walk/paddle upstream.