It is wise to buy lots of "Heavy Heal potions" to use to help heal members
of your party thereby saving your spell points.
If you get the chance to buy "Deadly Poison" do so as it will take out
most of the toughest monsters with one blow.
Skill bonus points: Weaponry skills take care of themselves so don't waste
points on them; Oratory is very important to being able to cast spells;
most of your points should be used to increase the art of learning and
exercising the spells of the character's profession.
