The most efficient way to kill Paineel guards on my shaman.

[Toxigen]

dont worry about listless

id pull w/ slow and melee...get a decent weapon like Poison Wind Censer or something

if you have plenty of mana toss in your most efficient (damage per mana) dot

if you're in a safe spot for afk just canni down to super low health and go AFK w/ regen on