So I'm theorycrafting here and it dawned on me, what if you don Vanguard's Challenge and slot Inner Fire and stay max distance of innerfire for the taunt? It seems like such a niche set, would people instantly catch on and jump the taunter?
Vanguard's Challenge:
(5 items) When you taunt an enemy Player, they deal 50% less damage to all other Players but 100% more damage to you for 15 seconds.
Inner Fire:
Ignite the fires of hate in an enemy's heart, dealing 410 Magic Damage and taunting them to attack you for 15 seconds.
Grants a 15% chance that allies targeting this enemy can activate the Radiate synergy, dealing 303 Magic Damage to a target enemy over 2 seconds, and then causing the target to explode for 982 Magic Damage to all nearby enemies.