Slashing, crushing, piercing, and missile are simply different forms of physical damage. Some types of armor are better against piercing. For example, your armor class is currently 3 and you are wearing splint mail; splint mail has a piercing modifier of -1, so your effective armor class against piercing weapons (daggers, short swords, spears, etc.) is 2. The only combination to concern yourself with is chain mail versus crushing weapons, because the modifier is +2.
No damage type increases the possibility of a critical hit, though. A weapon that deals out 1d8 + 3 damage does 4 - 11 damage; the damage type depends upon the type of weapon.
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An intelligent mind is the key to the universe.
The most distressing thing about practicing magic is the fact that even the most learned sorcerers cannot accurately describe what magic *is*....
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