The Elemental Sniper is a classic "glass cannon" composition that focuses on keeping distance and deleting high-threat targets before they can reach your team. It is extremely effective in open biomes like The Desert or The Alley.
The Triangle: Position your Tank in a choke point. Place the Mage and Hunter 4-5 tiles behind.
Ignition / Conductance: Use the Mage to set the floor on fire or soak it in water.
The Kill Shot: The Hunter targets the strongest enemy. Because the enemy is already suffering from Mage-inflicted status effects, the Hunter's damage is doubled.
Kiting: If an enemy gets too close, use the Tank's knockback or the Hunter's traps to reset the distance.