The description of demolition 90 says "More effective use of siege weapons".
I've ran some tests on my test server and found out that demolition 90 does NOT:
- increase damage of trebuchets
- increase accuracy of trebuchets
- increase the range of trebuchets
- increase the firing speed of trebuchets
- increase the damage of siege torches
- increase the attack speed of siege torches
So what does it do, or more precisely, what is it supposed to do since it obviously doesn't do anything at the moment?