If you weren't Space Wolves, i'd say Drop Pod and Librarian with Fear of Darkness - watch half his army desert him! Thats what you get for deploying on your table edge.
Really, drop pods are the best solution. If not drop pods, focus on men - get lots of rhino squads and bikers, hug cover, and try to get into h2h as fast as possible.
Also try to focus your deployment on one side of the table, that should either make him deploy some units farther forward, or not get all his shooting at you.
If he can open up with everything all the time, you need more cover on that board. Use 25% cover - that should cut down how much LoS he has.