Wodan,
All I was saying is that flank attack does not kill seige units outright, it just takes a % of their HP away so they cant effectivly attack. Units get flank even if they die to do it, I've had to sacrifice quite a few knigts to wear them down.
I think the value of feint tactics is a bit underestimated in this discussion. I started a large monarch pangea playing Cre\Pro. A few things I've noticed.
The AI can be VERY stupid about forts. Ragnar crushed my four fort defenders with his monster stack, then moved in next to my city. I moved units out of the city (who's defence was reduced to something like 6% at the time) and to the fort. They choose to attack the fort... It bought me a few more recuting turns and helped me to survive.
In another case later on they did not do this (much to my shagrin). It was the same city, same fort, same opponent, newer tech units.
Ragnar, Elizibith, and Hammurabi all attacked the fort, did nothing, or beelined to the city, pilladging has thusfar not been a concern, but in every case I had a counterforce ready to mop up and invade their terratory as soon as their SoD was weak, so I dont know if they would switch to pilladge tactics after that.
The most usefull thing I've seen so far, is that the AI focueses almost entirely on its SoD, so I've been splitting CGIII\Drill units and agressive CR units. Once they get a tile into my territory it seems like they are commited to their seige, so I've thrice sent my aggressive stack to take a city while my defencive stack deals with their offence (the enemy is tough for me on Monarch, so I only had enough attackers to take one city)
High level protective units have proven themselves to me, I overexpanded and got laged in midevil tech, so I was in a Longbow\Mace\Cat Vs Knight\Trib\Musket war, and the longbows where very successfull. Later I beelined medicine to get a corportation and got stuck in a musket vs rifle war that I thought would sink me, but the AI's bad tactics bought me enough time to steal rifleing and mount a defence (darnded AP palace ended the war as soon as their SoD was beaten)
To sum I would say protective is good if you can wait a couple turns into the war to lure their attack to your strong defence, and then counterattack while their main force is busy. I got the great wall from Babylon fairly early on and oh the GG's!