Dungeon Defenders: Apprentice

Ranged attacks, good towers, and a pushback on right-click. He's going to need a ton of mana at every stage of the game.

Towers

• Magic Missile: Basic tower, no elemental affiliation
• Magic Blockade: Simple blockade, saps magical resistance from monsters
• Fireball Tower: Slow to attack, but does splash damage
• Lightning Tower: Hits 360 degrees, chains lightning among monsters
• Deadly Striker Tower: Sniper tower, long range, but slow to reload and will hit anyone randomly

Skills

• Overcharge: Makes the Apprentice faster at summoning towers or charging Mana Bomb
• Mana Bomb: Uses your mana to bomb an AOE area after a short charge

Important Stats to Invest In

• Player Speed: A few points at least.
• Tower Health: Steady contribution is probably warranted.
• Tower Damage: Probably your main stat to invest in.
• Tower Range: Also good, eventually. Damage and speed first, though.
• Tower Speed: Upgraded attack speed is going to be important. Your #2 investment.