Well I know how to get the negative levels. The question is how do you control the wight at level 1
Depends on whether you're allowed to break WBL at lvl 1 with some dirty tricks, and if so, by how much. There's two cheap (<1,000 gp) items, Flametouched Iron holy symbol and Ephod of Authority, that each increase your turning level by one (though the latter will need an adaptation if it is to increase rebuking level), and Improved Turnig increases it by another one. By then you're at 4, but you'll need another 4 to control the wight.