I'd say this line of thinking is quite accurate. I've never been very comfortable with combinatiions such as BLM/BRD or /NIN for elemental ninjutsu for the sole purpose of hitting yellow "!!" in Abyssea. What I'd like to see in the future is the actual skills (ninjutsu, enfeebling, singing+instrument, etc.) playing a greater part in the accuracy and potency of enfeebling magic.