about skill damage calculations

[MaxOff]

How else can How else can lvl 40 people crit for 10k+ on lvl 1 slimes??

Easy answer. The damage is reduced by the defence in an non linear way. 2 Proofs i have seen in these forum so far:
1.) Damage multiplication if the defence is far below damage. "lvl 40 people crit for 10k+ on lvl 1 slimes"
2.) negative Damage Multiplication if the defence is far beyond the damage. Someone in these forum wrote that he made lesser damage then his damage bonus from str was, the diff was -2.

In pseudo c, it should look about like that:
Damage*= (Attacker.Attack/Defender.Defence)+-*/UnknownFaktors;

But what i know is that there is Pre- and Post- Defence damage.

a good example for predefence would be: Skills
a good example for postdefence would be: str bonus.