This is so damned pathetic. I don't even. He is the weakest motherfucker ever, got the strongest staff ever to make up for it... and sold it. It boggles the mind how anyone can be that stupid.
Also the fuck is this about 3 roles? NOPE.
"Attacker" isn't a role. It is the basic underlying tactic everyone should adopt when they're not performing their specialised roles. Even the damned healer should be attacking.
Specifically:
#1. Tank for drawing aggro and soaking up damage. Positioned at the front.
#2. Healer for maintaining the party (should be highest priority for protection). Should usually be able to cast buffs too. Positioned at the back.
#3. Nuker / AoE. Black mage spell-spamming to take out groups of weaker enemies. Can also apply to lighter melee fighters with sweeping polearms or greatswords. Generally the main damage dealer. Should be positioned in the middle of the formation if spell-based, or side/front to engage the enemy if melee.
#4. Spiker. Rogue / Assassin types who target the enemy healers primarily and casters otherwise. Adapted for unleashing large amounts of damage in a split second to a single target. Usually adopt a standby position at the edges of the formation and utilise mobility / stealth to flank the enemy group.
#5. Interrupter / Hexer. Those tasked with interfering with the enemy to lower their damage output or make them more vulnerable to attack. Absolutely vital against bosses and overly troublesome single enemies. Also usually at the edges of the formation, but may be more towards the middle or back.
#6. Minion Master. The jack-of-all-trades 6th role for Summoners and Beast Tamers, usually for filling in other roles as the need demands.