i just tighten it really tight with a chainwhip...no cheater bar or nothing...then i put the lockring on and tighten it really tight. i never have any problems with the cog moving...matter of fact that thing was a real sonsa***** when i last had to remove the cog. it took me 30 minutes and about 15 attempts before it moved.

grease, not locktite.
once you get the cog pretty tight you need to really torque it.
the best method i've found is to have a tire on the rim, inflated. then set the rim on the ground parallel to your shoulders, then lean over the rim and lean it on your knees, you legs bent a little. now hold the tire in place with one hand and also put pressure on it with your knees. have your chainwhip parallel to the ground or maybe in the 1 o clock position. use one hand on the tire to rotate the rim against the chainwhip while you use the other hand to tighten the cog with the chainwhip.