I'd go for your second statement. I'll give an exemple: Let's say you have crushing fist at 105% success rate and the enemy has 2 in bodybuilding.
Assuming same level, the odd for knockdown will be 105% - 10 x bodybuilding = 85%. The enemy must roll 85 or more to avoid the knockdown.
Some enemy may have as high as 9 in bodybuilding/willpower in hard difficulty. So having high success rate on spell like crushing fist is important for them to be reliable.
To be confirmed but there is also a 10% bonus/malus per level difference with you target.
For skill without save (eg: haste, divine light etc...), the % act has a chance of success; in case of failure, the spell is "fumbled" and will do nothing. Going over 100% brings no benefit in such case.
Last edited by Mugu; 01/08/14 09:32 PM.