Midrange Deathstalker Hunter (Rank 15-10+) (Legend)

I play this deck quite frequently in the current ladder. I went on a win streak from rank 15 all the way to rank 10. I hope to get to legend with this deck. 

Obviously there are some cards that you can replace as you please

Scavenging Hyena——->Kindly Grandmother

Hungry Crab——–>Firefly (but Murlocs are still common)

Stitched Tracker——–>Bonemare (if you want some late game value)

What works well:

The Stitched Tracker works well for getting more Highmanes and another Lich King, but remember it has very good early game value for more Golakka Crawlers to get rid of pirates, also for more Crackling Razormaws. 

Mulligans:

You always want your 1 or 2 drops. Specifically you are looking for Ally Cat and Crackling Razormaw. Keep Golakka against pirate and Rogue. Look for early game minions.

Strategy:

Develop the board early and clear when it makes sense. You want to adapt minions so the survive trades. Obviously you are a hunter so go face and do as much burst as you can. The Kill Commands and Eaglehorn Bows can be good finishers.

I AM NOT AN EXPERT BUT THIS IS MY BEST ADVICE. HAVE FUN AND GOOD LUCK IN THE CLIMB!