No, neither nDPS or aDPS is appropriate for job balancing, and they were never intended to compare performances across different jobs in different compositions in the first place. If you wanted to do this sort of a comparison, you would need to specifically determine the amount of additional damage a player is doing under raid buffs, and then normalize it relative to the number of two minute buffs active. If you can determine the actual per buff damage contribution and equate it to rDPS, then you can say how significant this effect is.