When you are going to fight jack of blades for the final time and you gota keep follin the path then when you get to this area with a farm house and a crop field activate physical shield and only attack with lightining but make sure your lightining is maxed along with your physical shield. Then make sure you have as much mana potions as you can afford (i recommend 50) and just stay there ive got my combat multiplier to 402 and then I started using meelee and ranged attack then and I maxed out my skills and had straight 999,999 experience extra for all stats.