I just wanted to mention that I do think it is a good idea to have some shooting in your Grey Hunters (Plasma guns/Meltaguns). This is great way to trick your opponent into preparing for a charge. You could easily make a faint, like your going to charge and give him another turn of shooting. You have two units of Long Fangs, let him sit out in the open and get shot up.
My thinking,
Unit 1 Grey Hunters Plasmaguns
Unit 2 Grey Hunters Meltaguns
Unit 3 Grey Hunters Close Combat- Flamers and MotW.
I would also make your Lone Wolf more CC type with Twin Claws to back up Grey Hunters.
I have had opponents get frustrated because I did not charge them as they were getting torn up by my Long Fangs
WT