A few months ago I made an AG build in Settlers. Here's my post about that. That post summarizes the core concepts of the build, which haven't changed much in Phrecia. The TLDR is that we use an Animate Guardian of Smiting, equip Replica Dreamfeathers on it, scale it's armour up to 1.5M+, and scale flat damage with Pyroclast Mines.

• PoB for Phrecia version
• Video of T17 clear
• Video of T16 Harbingers

Here's what's changed in this version:

• Does much more damage (400M PoB DPS at my current investment vs 50M in the Settlers iteration)
• Higher investment (I put in ~200D this time, though it's still really strong at ~5D investment, which is where I started)
• Feels better to play (no more managing spectres or banner skill - we use warcries instead which are easier to manage)
• Reaches a higher life pool (dropping Perfidy for Utula's)