Irvine is a ranged attacker with a 'Shot' Limit Break that allows for rapid-fire attacks using different types of ammunition. His Strength and Hit stats are crucial. He also has decent Speed. Focus on Junctioning high-tier magic to his Strength and ensuring you have a good supply of various ammo types (e.g., AP Ammo, Fast Ammo, Demolition Ammo). GFs like Cerberus and Pandemona can enhance his offensive capabilities.

Recommended Junctions:
- STR: Ultima, Meteor, Triple
- HIT: Double, Triple
- SPD: Haste, Triple
- HP: Full-Life, Curaga