I like the color choices for this deck but i do have a few suggestions that might make this deck run a tad bit faster;
1) add cards that have the converge effect (better effect based off of how many colors you use),
skyrider elf and
tajuru stalwart because they also get stronger based off of how many colors you use to cast them. This can be instrumental to any enemy's downfall.
2)
Retreat to emeria because the land drops will be constant, you can sacrifice the kor tokens using cards like alter's
reap,
vampiric rites, and
bone splinters and still deal even more damage because of
zulaport cutthroat on the field.
3)
Anticipate and
shadows of the past would be good to have because it'll help you fly through your deck and you'll find what you need a lot faster.
4) You should try removing cards like
rally the ancestors and replace it with
march from the tomb because your creatures are your greatest assets in this deck and the last thing you want to do is
exile them from the game. Also if you're going to use the beast caller then you should have more creatures worth playing in this deck that (like i mentioned earlier) have the converge effect so that you can get that extra push from your creatures). The
tajuru warcaller you won't need as much because all of your creatures are going to be strong enough to stand on their own without it.
The general idea that i'm getting at is that you should use the colors that you have at your disposal as a means of card advantage against your enemy.If you incorporate the kor token production like i suggested then the deck will really kick off as far as the effects of your creatures and field presence. How does this sound so far?