What is the best mastic, grout product and grout sealer for subway tile over drywall?

depends on the place u hav the tiles but for me i only use bal products bal bluestar would b suitible to stick tiles onto drywall and as for grout i find the cement based wide joint grouts look the best..any trade silicone sealant is the choice and as for finishing the tiles to make the job look good after silicone sealing get a clothe and some baby oil and wipe over tiles and grout ull see it brings colour out and any grout powder left disappears good luck