I haven't really looked at any of the flip cards aside from Growing Rites and Search for Azcanta, so I didn't even realize what that card did. That's not a bad idea at all actually. In addition, I like Goblin Bombardment not only as a wincon, but also a way to sacrifice the Academy Rector to start the combo turn.
Talking with my friends last night, they suggested I try a Grapeshot as a win condition, since part of my particular game plan is to bounce and replay Zacama to generate infinite mana. I don't really feel like playing a Storm card, since it doesn't really do anything until that turn, and I have better ways of killing the table than that. Perhaps it would fit your build better?
If I added any more doublers, it would probably just be a Vorinclex. That said, my local meta isn't really keen on Vorinclex, and I want to try and keep my friends while also being competitive. I'll at least give the others some consideration.
Academy Rector is sweet. With the inclusion of High Market in my deck, I can sacrifice the Rector to immediately go find the Mana Reflection, or perhaps a Greater Good if the Reflection is either not needed, in play or in the graveyard.
I haven't gotten to actually cast the Orim's Chant yet, but I was playing Silence before, and Chant is a straight upgrade over it.
While I'm probably going to stick with the traditional combo route, I have to say the Oath of Druids plan is incredible. Never in a million years would I have thought of that. Personally, I've been slowly lowering the CMC of my spells, and focusing more on stuff like Pyroblast, Guttural Response and Orim's Chant to protect the combo turn a little better. I'm loving the refinements that are happening with Zacama, and I hope one day he can be considered a possible legitimate combo general instead of just a big, dumb Naya Dinosaur.
Here is my Zacama list if you want to have a look. C&C is always appreciated.
As someone who's also working on a Zacama list, I love the addition of Shivan Gorge. It just seems so funny that such a black sheep in an otherwise broken cycle of lands can pull so much weight. I'm still opting to make infinite mana and kill everyone with Walking Ballista, but I'll at least keep that idea in the back of my mind.
Academy Rector is sweet. With the inclusion of High Market in my deck, I can sacrifice the Rector to immediately go find the Mana Reflection, or perhaps a Greater Good if the Reflection is either not needed, in play or in the graveyard.
I haven't gotten to actually cast the Orim's Chant yet, but I was playing Silence before, and Chant is a straight upgrade over it.
Here is my Zacama list if you want to have a look. C&C is always appreciated.