Archon

Archons are the Field Commanders of the Fallen, and are the primary link between their Fallen brethren and their Servitors. The Archons are religious figures in the Fallen ranks, and are thought to be servants of the Fallen gods (Prime Servitors). Archons in battle are extremely zealous in their faith, and are viscous on the plane of combat

How to Combat Them
Archons use Shrapnel Launchers, deadly Solar weaponry that is lethal to most Guardians in but a few bursts. These weapons operate similarly to Shotguns, but with a far more extended effective range.