It really does depend on what you mean by succulents too. Sedums (and associated genera) are classed as succulents and many of them are as tough as old boots. Sempervivums are succulents and they too are toughies.
Ok, if the sand is sharp and the drainage is good, then I would add a non-peat compost or leaf mould and 5-7mm grit. Say about 1/3 sand/ 1/3 grit and the rest compost. Succulents do not need too much food.
I would avoid any thing with peat in it, not because of any 'green' issues with its use, but because the dreaded Vine weevil love peat. And the insectcicdes used to kill the grubs will kill the succulents.
Sterilised top soil would be ok if that is what you can get easily.