The long term solution will be to treat Ranged as a single category for the purposes of LB generation and 1% damage buffs (i.e. combinations that break from the 2/2/2/2 format are considered non-standard, similar to how it currently works for solo tank and solo healer violations). Then DPS and utility balance really only matters within a given role category (tank/healer/melee/ranged). At that point you could probably turn Phoenix Down into a role action for Ranged jobs, such that you can bring any combination of two Ranged that you like.