did some more tests.
In total (including the coastal city working one fish)
Benefits to food under Aristograrian
+28, +27, +29, +28, +25, +24
Benefits to food under Agrarianism and a different Govt Civic
+22, +20, +22, +20
Therefore my Conclusion is that a primary strength of aristocracy is that Agrarianism is STRONGER (relatively) under Aristocracy.
IF Agrarianism was moved to be % rather than +Int, I think it would be more balanced.
Therefore I propose Agrarianism to be somewhere between +20% and +28%. Personally I am more favored towards +25%, as to make it not too weak, yet not too strong either. Yes, I know that we will now be getting plains hammers back, but I am fine with that.
So Agrarianism
+1 health all cities
+25% food all cities
I also don't think there will be an issue of making the elves too strong, because there is still Guardian of Nature civic for it to compete with.
Generally this will make agrarianism slightly weaker and slightly stronger in the majority of cases ... although a major distinction here is that it will finally make Agrarianism WEAKER when combined with Aristocracy, rather than stronger. In this way, Agrarianism can help mitigate the penalty of Aristocracy without making it SUPER synergistic.