Lorgus Jett

Moonshrine Ruins
Work through the Twilight's Hammer groups and find Lorgus Jett before leaving the ruins. Horde groups should clear the water around the Fathom Stone before collecting the Fathom Core and fighting its Baron Aquanis summon; check for the Strange Water Globe afterwards. Take the underwater detour to Old Serra'kis before returning to the ritual chamber, with enough breath to fight and swim back.

Lorgus Jett
Elite HumanoidLorgus Jett combines Lightning Bolt casts with Lightning Shield retaliation against weapon attackers.
Abilities

Lightning Bolt
Blasts an enemy with lightning, inflicting Nature damage.
Interrupt Lightning Bolt so Jett's Nature damage does not overlap with Lightning Shield retaliation on the tank and melee players.

Lightning Shield
Lightning Shield retaliates against melee or ranged attacks. Remove the shield with an offensive dispel when available; avoid spending weapon burst into it.
Tank- Pull Jett clear of other Twilight groups before engaging, then keep an interrupt for Lightning Bolt while weapon hits can trigger his Lightning Shield.
Healer- Watch the weapon attackers as well as the tank for Lightning Shield retaliation; be ready for extra Nature damage when a Lightning Bolt completes.
Damage- Remove Lightning Shield before weapon burst if the group can dispel it, and share Lightning Bolt interrupts rather than letting every cast land while attacking into the shield.