I've posted this before on threads about pld aoe and I'll bring it up again here. I disagree with giving Flash a damage component, I'd rather see Pld given a new damage dealing attack with a decent potency that's on the GCD and utilizes one of the resources that Pld never really touches, that resource being it's MP. While I don't think that Pld should ever be given the same MP focus as Drk, as is a Pld never even needs to use their MP if the group knows what they're doing and as a result I believe giving Pld some new MP costs to work with is the way to go.
As far as WHAT to give Pld to improve it's damage, I say look no further than the Holy Sword magic from Final Fantasy Tactics, http://finalfantasy.wikia.com/wiki/H...cs)#Holy_Sword
These abilities were powerful spells that had both single target and aoe applications and did great damage even if their associated debuffs didn't stick to an enemy. I believe adapting 2-3 of those spells and making them AoE attacks on the GCD (with a high enough potency to warrant being on the GCD so they aren't used against single target) that cost MP would go a long way towards helping Pld do AoE damage. I do think pld single target damage is fine though, hence why I say keep them on the GCD.