Mulligans
General Mulligans
In some matchups you want to keep deahtstalker rexxar. In my experience, keeping rexxar is actually good against shaman and druid, since you'll run out of fuel very quickly.
I think this will be a better version of the current deathrattle hunter out there. Although it doesn’t have the kathrena package, it does have Mechanical Whelp‘s, which will work very well with the deck. It also has Boommaster Flark as a potential finisher. If the bombs actually stick, you can play Necromechanic with Void Ripper on curve for a total of 16 burst damage on turn 8. I’m not sure how good the Necromechanic but I think it has some potential in this deck, since you usually have some deathrattle minions sticking around.