Are you just going off the tooltip? Cause it's actually misleading.
http://www.reddit.com/r/ffxiv/commen...d_foe_requiem/
I've seen multiple places where this has been tested and Foe Requiem does in fact boost unaspected damage.
That removes both those points since Foe is the equivalent of the Dragoon's Disembowel for BLM and SMN. I think the reason Kevee assumed you meant cross class skills is because it's the same point.
Also,
How is Miasma 2 not an AoE? It has an area of effect. It's more of an AoE than bane is considering it can hit more than 3 on its first use.
It's not direct damage AoE and it's not a burst AoE, but that doesn't stop it from being an AoE.
AoE simply means an ability that hits multiple enemies in an area, i.e. area of effect.