Thats not a bad sideboard to run in R/b/g goblins.
The current sideboard that I've been running to good success is the following:
4 Pyrokinesis
3 Krosan Grip
3 Cabal Therapy
2 Smother
2 Tormod's Crypt
1 Goblin Sharpshooter
I'm still a fan of pyrokinesis b/c its good against aggro. Maybe smother is the better choice, but I like pyrokinesis just in case other goblin decks show up.
If I expected a lot of control and combo to show up, I could easily take the pryokinesis out for thoughtseize as it helps in both of those matchups.

