I'm running a Faye as AR supertank, since she has the best defensive stats out of all archers.
Build:
Faye +2
Neutral IVs (I want +def)
Guard Bow+ (Def refine)
Draw Back
Iceberg
Fortress Def/Res 3
Null C Disrupt 3
Atk Smoke 3
Quick Riposte 3
Works great with a little support, can tank Ophelias and Lilinas, can counterattack against Firesweep Bows and Staves.