---in operation boss fights.
Just curious... I'm sure it takes a lot of skill and attention to maintain dots on multiple targets, but the remaining bosses are going to be healed to full whenever one of them dies anyway. As Lethality i try to maintain at least 1 DoT on another target if possible to help with energy regen. But that's about it. Other than that, GCDs will server better purpose, imo, on the main target
to help you and your raid finish the encounter faster.
just my 2©