Rodrig0
Monarch
1) Unit support- The AI overbuild units and improvements so they have little spare income. Fascism unit support is the best. (The AI spends 60-80% of income to tax, humans spend comparable amounts only for zero-research gambit strats, otherwise they will use 30% or less)
How's that? Fascism gives unit support of 4/7/10 and Communism gives 6/6/6. And the AI never has that many cities, much less metros. Many of their cities never grow above 6 pop, so Communism would give a better unit support.