Everyone knows the silliness that can be done with sneak5... try this.
Get yourself a nice ridiculously high level crossbow from some random chest. Sneak in, blast the holy hell out of your choice of victim, and then *resume sneak*.
And you've pretty much won the game. Because sneaking at range is easy and crits with a crossbow are constant... tenebrium crossbows are devastating.
My lvl 9 virtually one shots everything of equal level.