Due too some negative comments on my last ballista farming guide.. I decided to do a newer improved ballista farming guide based on two average attack stat hero's..
As you can see it shows.
1 The NPC level
2 The Amount of ballistas used
3 Current hero's attack Stat
4 My current archery level
5 my logistics level
6 Transports required to carry all resources
7 Total res found in relevant lvl NPC
However there are many variables that can change the enviroment you find yourself battling in.. for example the attack statistic of your enemy hero can make it harder for you to win without casualties.. your level of military tradition is also a factor that helps your attack...
Military tradition level is one thing I have niot included in my chart, I'm not intending on giving every secret away so easily, you all need to experiment to find out whats right for you.
Personally I like to overkill a bit, gives me a sense of security... so if you don't like the ballista numbers in the below chart because you think its too much or too little... I suggest you take into account how the variables can change... and write your own guide if you think you can do better!
Author accepts no responsibility for loss of troops during battle due to the goalposts of game variables changing for every player.