wax over sealant is guff, it results in 2 different types of finishes messing with each other.
sealants give a really crisp finish with crazy reflections and great flake pop in metallic and pearlescent paints.
wax gives a deep glossy wet shine, so when you wax on top of sealant you lose the sharpness and flake pop, meaning the sealant was a waste of time. Some sealants and waxes also don't bond together properly.
HOWEVER, there are some special waxes on the market designed to go on top of sealants, preserving the crisp shine and reflections while adding the depth and wet look, my favourite of these being Blackfire Midnight Sun Ivory Carnauba Paste wax.
As for glazes, they do make a different to the finish, laying down a nice base for the LSP and increasing depth and gloss while masking minor defects