First of all, I enjoy your battle reports. Short, sweet, and to the point. Love it. Second, Go Daemons! Third, I like your list. Maybe not top tier competitive, but a little bit of Invis goes a long way (except when it fails

) and I love me some Hound rush.
A couple pieces of food for thought though:
-I think you could have deployed a little better. Against this Tau list I would have deployed all the Grinders with their clawed toes on the very edge of your deployment zone so that their torrent flamers and close combat threat would have come into play sooner. Deploy your hounds as close as possible in between the Grinders (leave room for a few hounds to be on the line) and then scout move so as to maximize the pressure. You don't have to worry about "moving" over/through your own models as the Scout "move" is actually a redeployment and thus you can ignore moving through your own models.
-I heard you say that the S8 AP1 lance gift was useless (which it largely is) so don't forget that you can swap it out for a greater aetherblade. Doing that will net you an extra attack for having 2 specialist weapons and the +1 strength is useful sometimes against armor.
Other than that, well played. Skulls for the Skull Throne!!