This is not as big a problem as people think, for following reasons:So if people have nothing to do, after all buffs/debuffs are up and running they can throw in one or two damage skills as last resort of filler.
- healers also need a minimum of damaging skills for solo duties
- Buffs and debuffs can have a short duration, so reapplying will fill downtime
- Some skills can be channeled, so you can't use other skills during their uptime
