WHM Vs AST Healing Comparison at 50

[GideonHighmourn]

Yes, if you Royal Road either the Spear or Arrow cards you will get the ability to AoE your next card used but at 50% less potency. So if I were to Royal Road Spear and then draw Balance (10% increased damage) I can give it out to the entire party but at 5% damage.

Does it effect the entire party, or is there a specific radius of the effect, similar to Cure III or Deployment Tactics?

If it's a small AoE, I don't see stopping DPS to group up to get a small DMG increase being that effective, especially since you've given up a previous (DPS) draw to do so.