If only his plotting and scheming had involved waking Elijah as his top priority. :P

See, I got the impression that getting Elijah back was a priority for Klaus. But he knew that if he let the witches kill Marcel, they would get their hands on Davina and use her against all the Originals (Elijah included). So he came up with a better plan, which involved ingratiating himself so deeply with Marcel that he would feel obliged to give Klaus what he had asked for. And it worked perfectly.

(Except for the fact that Marcel can't control Davina at all, which is something that not even Marcel was aware of, until she said no.)