Bard/Dancer Skills

So I'm interested in putting a bard/dancer class in my game.  The way it works in most FF games is that the Bard (Support) and Dancer (Debuffer) use specific skills that last the duration of their charge time.  Basically if a Bard plays, for example, a Health Regeneration song, all allies on the field get the buff for the duration of the specified charge time.  Same with Dancer, except it's debuffs on enemies.  I've experienced this in an old script before with Saba Kan's Kiseki Battle System, which had something similar.  Unfortunately, my current project is currently working with an ATB system so that's not an option anymore.  Might be a stretch but if somebody could point me to a similar script for ACE or (even better) if someone has any idea on how to implement this to an ATB system (currently using MOGHunters ATB), that would be awesome!

Moghunter ATB is not very flexible,a lot of people tried to make some modifications to make it work with their current script database.

I recommend you this ATB,it is hard to use because it is in Japanese...

http://ccwinter.blog.fc2.com/blog-entry-89.html

Excuse me for my bad English and greetings from Argentina.

Wouldn't this work using the standard State durations?  Or am I missing what "Charge time" means?  Does it mean "Player chooses how many turns to 'charge' the effect for, then the effect lasts for that many turns?"  If so, that would need some type of scripting.

The closest I get is a Martial Artist who has nifty attacks --- and when you use one, it Seals his Special attack abilities for several turns afterward, and sometimes weakens him for those turns (for the really powerful attacks).

The problem here is that ATB and CTB combat systems don't have turns - they count points or seconds and each skill needs a number of seconds/points to be executed, after that the actor can have the next action - and fast skills could be used multiple times in the same number of seconds as one use of a slow skill.
But because there is no "standard" how ATB/CTBs are programmed, you need to analyse the script code to add anything not provided by the original scripter into it.