Beast Zoo (Warlock, looking for improvements)

I've started building a Beast Zoolock deck around History Buff, Untamed Beastmaster and for the meme of it: Hir'eek, the Bat.

Faring well with it in Casual, but I'm looking for ideas to improve it in ladder matches (rank 5 and up).

Feel free to test and comment! :)

EDIT: One of the main problems is Control Warrior, but frankly speaking there aren't many zoo options to improve that matchup, so I chose to ignore it.

Tortoise is terrible in warlock, play crystallize instead.

Desert hare is just bad as well yes it's a beast but not worth, you want mana cheap cards to play with history buff, would remove tortoise, desert hare, spirit of the bat 1 spirit bomb

And add: another Vulture, 2 crystallizes, zilliax+ SN1P SN4P, 2 beaming sidekick, probably also - 2 helpless hatchling for dark deals or mecharoo as well.

In conclusion even if it's mostly for memes don't run bad cards, and do run good cards. 

The amount of 1 drops is too low for zoo btw. 

If you're playing handbuff, Doubling Imp is really good. But... not a beast.

Maybe play it anyway, plus Nightmare Amalgam and Sense Demons. Although that may be too slow for a zoo deck.

In general, I think the lack of good beasts is a problem; the mech and demon options are just stronger.

Perhaps you could run Stonetusk Boar; if you want to play lots of small minions for History Buff. [Hearthstone Card (Soularium) Not Found] might be good as well, to draw a lot of cheap cards.

Just because cards are bad in general doesn't mean they can't interact to become viable. Hare might be bad, but with Spirit it is able to triple buff. I've easily taken down oponentswith a 5/7 tortoise for 3, etc.

Looks decent, but i personaly am more of a fan of the not beast or the Lackey Zoo Decks. 

One Question tough: How is History Buff performing for you? i think he can be very good in  Zoo decks, but right now i do not want to craft him ...