If you are able to get 75% of your simmed dps I think your in a good spot. This is my arbitrary threshold I have for any team as a goal.
I have Starfire/Wrath on a cast sequence and just rotate between them with the understanding that I’m going to miss eclipses benefit but this way it’s only 50% of the time. The other 50% is within the benefit.
Their dps feels a little more sluggish (I think this is for any class though after the squish) but overall happy with it.