Hey, I like the deck! I tried Athreos but never had much success but I'm definitely a fan of orzhov. Here are some suggestions:

Wound Reflection really helps make Athreos a threat.

Swords to Plowshares is better than Path to Exile and Anguished Unmaking is better than both imo.

Rally the Ancestors/Wake the Dead is better than Immortal Servitude but Living Death is probably the best.

Hope these help!

Hi, dlamars. Thanks for the kind words and suggestions!

Wound reflection is cool. I'll add it to the maybe list.
I chose Path over Swords because giving my opponent life is not something I want to do with this deck. ;)
I play Wake the Dead already, it's really good indeed! I don't play Living Dead because the chance of exiling my own creatures is counter productive.
I didn't know Rally the Ancestors yet, that's a great one, as long as I have sac engine on the board, which shouldn't be a problem :)
Thanks again!

No problem! Glad I can help a little. I'm not sure what you mean about Living Death though, it exiles the creatures in your graveyard but they return from exile to the battlefield. Nothing stays in exile if I'm understanding you right.

Woops my bad, you are 100% right :). Played Living dead in many decks, think I might a slight brain failure just now.

-Abyssal Gatekeeper+Thraben Inspector

More card draw. Gatekeeper is only good in certain situations, so it's gone.

Played with it yesterday, and was almost surprised at how well it worked. Better than I thought. It's very much in balance and a lot of fun to play.

Maybe razaketh, the foulblooded for a fun add/tutor/finisher.

Also maybe Lightning Greaves or Swiftfoot Boots for haste and protection

Thanks for the suggestions :). I considered razaketh, but the 8 mana is just a tad too much for this deck. I'll add him to the maybe-list though!
Lightning Greaves and boots aren't so useful since Athreos isn't a creature most of the time plus attacking rarely happens with this deck since most creatures are tiny ;). Not really worth the spot.

Exquisite Blood would be a good add.

Maybe Sheoldred, Whispering One could be a nice include since she can bring back a card for free every turn. Also, although you did say you don't plan on attacking too much because of tiny creatures, Elesh Norn, Grand Cenobite could allow you to get some hits in and destroy token decks. Then again, I just love the Praetors :)

Thanks for the suggestions :)Yeah sheoldred is indeed a nice creature. Ive played it in other decks. I try to keep the amount of expensive creatures as low as possible though. And have many ways already to get creatures out of my grave for cheap ;).Elesh is brutal, but buffing my own creatures actually works counter productive in this deck :).