I created this deck in response to the amount of Tempo Rogue decks there seem to be currently. (However, Heal Druid will make you sad. Accept that one :-P )
It does particularly well against Rogue and Mage decks in part due to the sheer amount of face damage it outputs. (assuming you can get a good start and keep up the pressure)
Against Big Mage, they simply don't have time to get their giants online before you crush face.
Look for the Town Crier or the Deckhand (if you are going first) to start. Make only the minimal and value trades - or to remove taunts etc. Redband Wasp and Inner Rage are your best friends in the early game (along with Frothing Berserker for backup). a 2-mana 6/2 is terrifying for the opponent. :-)
Nobody expects to see the Arcanite Reaper any more. And even better, the Sul'thraze (which is perfect for clearing Dread Corsairs against Tempo Rogue. Using either of these with Upgrade can be devastating.
As cheesy as it sounds, look to go face as often and as much as physically possible. You can (usually) pretty much ignore the board for the most part of the game. Taking damage will help your Mortal Strikes do more damage to finish the opponent off.
I've been playing this deck extensively now and it's taken me pretty consistently from Rank 5 to my current Rank #1. And it shows no signs of slowing down.
Mortal Strike are devastating against Rogues because they will often get you down to 12 health with their cancer Waggle Pick. Use the added Acidic Swamp Ooze to screw with their tempo plans. It's brilliant!
Legend rank seems a piece of cake with this deck now! :-)