It's fairly simple, as long as you have your dex and int close to max. Basically you pull with the DD, and put your damage shield on. The damage shield is the key. You can pull mass amounts of mobs with full servant. You alternate damage shield and heal over time as needed, quickcasting (facilitate painworking) your PBAOE DD whenever it's the FP is available. Use your bot to fully buff you and keep you healed with small heals (to avoid peeling aggro). Works even better if you have a power font available. If not, stick to pygmy goblins or the orc army out near Clifton (just don't kill the orc leader or the respawn is around a real life day or so).
With a power font, full buffs and a LIVE cleric, I've seen a servant necro farm shades of mist scrolls out at the grape con priest camp, I've seen one solo Danos for Guard of Valor, I've seen one solo all the Ceremonial Bracer mobs, the Tartaro's Gift encounter, and the Braggart's bow encounter. It's pretty crazy.