So right now i'm at level 25, My att. range is 200+ and def.200+. I'm wielding a guitar (hammer/axe)att:99 which I obtained from Sierra's side quest. The oligator seems to be taking uneffective damage from my weapon. With 3 of my strong monster companions: 2 mini golems and 1 tortoise. It takes atleast 5 minutes in order to effect 10% to his life points. Please give me your insights on defeating him. Thank you!

Also another question, I've already upgraded my forging station for the weapons but some weapons that I want to make will say that "You haven't learned it yet."