How does sneaking work?
With sneaking you can pass monsters without fighting them. Your chance for that is: With skill sneaking: Luck * 5% + Dexterity * 10% + 25% Without: Luck * 5% + Dexterity * 5% In Bat + Bird + Catform you got 70% Invisiblity gives you another + 40% Minus the Awareness of the Monster Maximum is 80% Additionally sometimes monsters do not notice you and do not attack then.