[The] cool way I think to do a Navigator Sorcerer is not so much to come up with yet another chaos worshiping jackass but rather a guy who indulges in sorcery knowing he's part of the one group of people who can actually do it without ultimately falling to Chaos.
I really hope this means your Navigator is actually a Necron.
Well I probably oversimplified a bit, obviously Navigators still have to be careful regarding the warp and it can still affect them but it would be more manageable and less pronounced. In the long run accumulated corruption would still likely influence the character's personality negatively pushing them toward even more depravity and if you accumulated a hundred you'd still basically turn into a chaos champion and flip out.
However as a Navigator you're still in the best possible position if all you're going to do is dabble in sorcery for specific limited ends and you're in a better position to clean up your own messes. Your biggest risk is probably being possessed, the rest is fairly manageable.
Also correction to my earlier post, you don't kill deamons with lidless stare you kill them with held in my gaze or whatever it's called. Very similar ability but a different one nonetheless.
Edited by Amazing Larry, 24 February 2014 - 03:13 AM.