CA is really moisturising and it has the same fragrance as the Glorious Mud body mask...kind of like a saffron/vanilla/almond mashup, sounds revolting but I loved it! The saffron bumps the price up.
Floating Island is OK for dry skin, but it has sodium bicarb in it (even though its classed as a melt rather than ballistic or bubble bar) to make the creamy foam on top of the bathwater. This can irritate some dry skin.
I used to rec dreamtime instead, another melt, but with a lavender oil (good for healing), cocoa butter and almond oil base instead. That is fantastic for very dry skin, especially eczema. Butterball is a good bath ballistic for someone who wants the fizz in their bath as it has chunks of cocoa butter which melt as it fizzes, and moisturises the most out of the ballistic range.
Ceridwen's Cauldron is another fantastic melt for the driest skins, its wrapped in a muslin cloth and contains cocoa butter and oats. When warm water and the oats mix, it makes oat milk which is extremely gentle and very moisturising.