We have archery.
We also need HBR for war eles when we get construction. We should be using WE quite a bit to defend against Kaz, and we need HA to flank cats, so HBR is by no means a bad tech to research.
We do however want the second trade route that currency gives us (as do Saturn).
Personally, if Kaz back down, I'd finish currency, get HBR with cash from Saturn (so they stop researching Fued and send us gold) then we send gold to Saturn to finish Fued. That should probably coincide with us getting the blocker city down and upgrading the archer to a longbow (how much gold is that again? 125?) making it safe for Kaz to get Fued.