- Correct implementation of NPC_PIERCINGATT, NPC_COMBOATTACK and NPC_RANDOMATTACK (bugreport:7331):
* NPC_PIERCINGATT deals 75% damage, ignoring DEF
* NPC_COMBOATTACK deals 100%+25%*level damage spread on level+1 hits (note: it's not 100% fixed because of rA handling soft DEF wrong)
* NPC_RANDOMATTACK deals 100%*level damage with a random element

git-svn-id: https://rathena.svn.sourceforge.net/svnroot/rathena/trunk@17184 54d463be-8e91-2dee-dedb-b68131a5f0ec