It’s almost never worth moonfiring an AOE pack during lunar, unless it’s like 2 mobs that will live for ages. It’s all in the guide. Solar is our dotting eclipse.
If you set up properly, this will be your rotation for most AOE packs:
Starfall, Wrath x2 (enter lunar), Sunfire x1, Starfire spam.
That gets Starfall up, which is AOE priority #1, even more important than getting into an eclipse. Then you enter lunar, and about now everything should be stacked for a single Sunfire to dot everything. Then you spam Starfire.
Understanding how long things will live, and when and what to dot, is how you maximize dps. But the above is basically what you should be going for on most AOE packs. You’d be into very high keys, or your group is doing terrible damage, for it to be optimal to play differently most of the time. (E.g. the packs are living much longer).
Another tip is try to end a pull in Solar, if the next pull is another AOE one. This means the time between pulls you’re in solar, and can use the end of that solar eclipse on the next pack, to get starfall and your dots up (including moonfire) and then go to town as you enter lunar.
I see a lot of boomy’s enter another lunar eclipse when the pack is only going to live another couple of seconds. Then they end up wasting lunars between pulls, and spending most of their dps time in solar and kinda getting stuck in that pattern. It’s best to hold that lunar if the pack only has a few seconds left. You can spam unempowered starfires for some dps, and pool AP and get ready for the next pack by only needing 1x wrath to enter lunar, etc.
There’s a lot of subtleties, it’ll come with time.