If Shaka is also without metal, then the situation is not that bad, but be sure to be first to cat, even if it is for defence only.
Checking for horse is now a top priority
Why don't you step down and leave the start of this RPC in Rusten or someone's hands, let him deal with Shaka, then step back up and do the rest of the game?
Just going to throw this out there, but you could re-start with my edited WB file. Moving Shaka to another landmass makes it so you can actually play it full on in RPC mode, and concentrate on getting the Shrines instead of spending 1/3 of the game dealing with a very difficult neighbor on a small landmass. I am thoroughly enjoying it, I can focus solely on the RPC condition, for example one of my neighbors has a Shrine already, and I am buddying up to his Worst Enemy, so we can work together and I can get that Shrine.
One point noone has mentioned yet which is my giggest concern. I have warriors while Agressive Shaka has archers. I have seen AIs successfully use an archer rush before on me! At this point though, I don't think I can get hunting/archery teched and enough archers build to hold off Shaka. Best to "Pray" Shaka converts REAL Fast!
- I don't think that A-rush is very likely on Monarch, so you are pretty safe for now.
- Shaka doesn't care much for religion. Just like you, he doesn't have enough room to expand, so he'll attack you very soon, once he has access to iron.
- I don't think that horses will help a lot. Chariots and even horse archers are dead meat vs Impis.