I agree with Tenshi that having other ways to gain experience would be bad.. as it will bring another kind of unbalance to the server... (that's what GMs have been avoiding)
So, I fully support the "level the old fashioned way" by killing monsters. If you don't know, eXo, mvping is also a fun away to get experience.
If creating potions can give exp... it will only advantage the alchie, priest (holy water) and sin X (EDP).. So, I would say a big no no to that.. even though I play one of those classes x_x"
Semper vigilans.
Living my life like a ninja... so, leave me alone... *vanish*