Okay then, in general I I like the list but I have always found that 5 man squads of grey hunters are too fragile to do any real damage. they will be key to winning in most scenarios, but yours are too easily distroyed. Once their transports are popped, even one volley of bolter fire without special weapons can cripple them, meaning that you are completely relying on wolf guard to get in combat. because of this I would recommend exchanging razorbacks for rhinos, and upping the squad size to 9 men and the wolf guard.
I agree with the hammer unit being too expensive, it is over one third of your points. Scrapping this will free up points for the grey hunters. I cannot recommend giving grey hunters melta guns strongly enough, you are really lacking in anti tank, and this can help the problem. To this end I would recommend giving the land speeders multimeltas, and buying Anouther squad of long fangs with missile launchers. this will let you take out any tanks.
If you have any leftover points, then I recommend one more thing, one unit of grey hunters in razorback with las/plas, to act as an objective sitter.
Good luck in the tourney