Go ahead and smokescreen, but then move to the stairs.  Partial concealment just isn't going to stop them from figuring out you left, so Sam needs to tap you with the wand there, and the entombers need to die, unless we want to fight our whole way further on. (After all, the Entombers are almost certainly going to see right through the wand, unless they have very low will saves.)<br/><br/>Depending upon the answers to my questions about the way down, I have a longer plan.