Rocoteh
I found a way to reduce the number of wonders needed to build units resulting in less cities razed by the AI.I took 2 unused buildings & made them small wonders named Airborne School & Marine Academy.With the exception of the US para & marines & the IJN marines all the a/d stats for the countries that build them are the same. So I placed 1 of each in Germany, France Great Britain,USSR,Italy & the Airborne School in Japan. This means that those cities & the wonders that had produced them will no longer be AI razed. The frequency differences that they were produced are not so great that it affects the game. I made paras 25 turns & marines 30 turns. Also since no civ can have more than 1 type of small wonder they disappear when the city is captured & it is not razed.
I also made a small wonder called Naval Shipyard that I gave to the US. GB & Japan that builds a dd every 7 turns since the AI loves building BB & rarely anything else. I consider these 3 countries the major naval powers needing the most help.Germany gets 4 auto built subs for every 1 dd this will produce & I do not think Italy was after they lose their fleet early but it can be added to any additional civ w/o any problem.I used 1941DD as the unit but any DD will work. I tested all 3 of these small wonders & they work.
I hope this info will be helpful to you.
The Dragonlord