I still think stacking wars were more fun and engaging and really felt like a bloody war, especially lots of units all over the place, overwhelmed, distruction, omg when you see reinforcements coming and coming. You didnt know when the city will fall, or how frikin more units does he have there. If he was loosing on the battlefield he would just retreat into citys and defend there where he got more bonus points and waited for possible reinforcements. The AI combat was smarter IMO and more respected because he would just weeken you with lots of units, he would conquer citys more faster and simple. After a tired war with a big civ AI, you couldnt afford going at war with another or going with 2 or 3 nations at the same time was really heavy and hard stuff. The AI was more dangerous because of sheer numbers. The fact that he could move everyhere made it more compelling and didnt need to think much, it wouldnt suffer so much from Dumb AI combat syndrom. You would still beat him if he had a larger army of course but you would suffer a lot of loses just like in real wars. Now the problem is with the SOD where the human would conquer everything with like a 100 tanks in one spot, that problem has a simple solution with a simply limit stacking of 10-12 for example. Another idea would be give a space on tile for each unit like axeman has 1 slot, horseman occupies 2 slots, tanks 3 slots, catapults 2 slots etc. The number of slots in a tile would be 12 for example or other programers chooses for balance. So you can have either 4 tanks or 12 warriors or 2 tanks and 3 horseman or 3 tanks and 3 rifleman etc. When you have a combination on field you can have multiple small advantages or small disavantages. The possibilities are endless because in a all over the place war the combinations changes all the time moving units from one tile to another so it would be a heavy chess game. There could also be some kind of anti stacking artilery weapons or units developt like the bigger the stack, those units/artilery will make more damage so untill you take them out you would consider to split them apart more. Also I would put in citys a 32 slots availabe for better defending(that would mean 10 tanks max) My last paragraf would be my best personal combat idea for a civ game, where war is more tough, smarter, maybe fun or brain meltdown depends and the AI doenst need to develop you know AI hehehe. Still think that stacking wars were more fun and better ability from the AI because he could move units anywhere.