its not an amount of monsters. it is a matter of your dexterity and how much you use the peircing/

slicing

 or stricking/smashing or ranged weapon. if your dexterity is high and you use the P/S weapon type all the time, your skill lvl will raise quickly. your dex needs to be around 2/3 of your level to lvl your weapon appropriately according to your level. keep your DEX there and just fight like normal your skil will raise, you can watch how quickly it raises by looking at your info page and seeing what percent it is at -- it says "P/S weapon skill lvl X(

Z

%)  -- if the variable Z is 99% then you are quite close to leveling your weapon skil level. when the variable Z is over 100 it means your DEX is too low or there is some other reason for your weapon skill level not being able to LVL until you lvl up , change DEX or make some other change..  

-jb

i just defeated um... and i got 100 points and a level up in p/s +1 wich makes py p/s level 5!

i dont know where you see that (z) 99% or 54% thingy.

do you know how to access another persons information by clicking on their name. get to that same page for yourself by clicking the small icon inside the icon located in the upper left-hand corner of your screen (your four character pictures.) inside of one your character pictures is a small icon in the lower right-hand corner of the icon of your character. click that to access your info page and then find ur skill level and the percent.