So i see that there isn't a 6th class (Int/Dex class). I was looking at other people's ideas and noticed they mentioned "Monk," but that seems to be in many games that have been mentioned recently (Diablo 3, WoW: MoP, etc).

How bout a Dervish? A Dervish is a religious man who has taken vows of poverty and austerity, similar to mendicant friars (a religious person who is a beggar for the sole purpose of learning humility).

The weapon of choice for this class could be a Scythe (A 2-Handed Melee Weapon) or a smaller version of a Scythe, a Sickle (A 1-Handed Ranged Weapon). The Sickle can have the same mechanic as a wand; a ranged magical weapon. The Sickle can either be dual-wielded or used with a shield.

Attack/Spell Gems:
Oscillating Reap - A melee strike that hits 2 or more enemies in front of you.

Reaping Leech - A melee strike that does said damage, healing you for a percentage of the damage done.

Banish - A melee strike that does said damage. Deals double damage to undead.

Crow Storm - Summon a bunch of crows around you that deals damage to nearby enemies.

Zealous Thorns - When you are struck by an enemy, deals said damage.

Harrier's Plague - A damage over time spell that does said damage over time. When the spell ends, it jumps to a nearby enemy.

Guided Corruption - A direct damage spell that deals said damage.