Wombo combo around Moonfall
Diana pulls targets together with Moonfall, creating a perfect window for allies who need enemies close to each other. Yasuo can convert the knock-up into Last Breath, while Orianna can layer Shockwave onto Diana's entry. This synergy works because it does not only ask Diana to kill: it turns her engage into a teamfight structure where every second after Moonfall becomes lethal.
How to play it. You need to prepare vision before the objective and avoid engaging too early. Diana should enter when Yasuo or Orianna are in range to follow, not simply when she sees an isolated target. The fight is won through synchronization, not raw speed.
Chain engage and lockdown
Diana likes allies who prevent enemies from instantly escaping Moonfall. Galio can join or complete a deep entry, while Leona brings an initial control layer that makes Diana's Q + E much easier to land. This composition type reduces her biggest risk: entering alone, getting controlled, then watching enemies scatter before her burst is enough.
How to play it. Ideally, one of these champions should force the first reaction. If Leona or Galio lands control, Diana can enter with more certainty. If Diana engages first, the ally must be close enough to extend immediately.
Post-commit protection
Lulu does not create the same wombo as Yasuo or Orianna, but she answers a very concrete Diana weakness: surviving after entry. Diana can land her ultimate and still remain exposed if enemies survive the initial burst. Well-timed protection, extra durability, or defensive control can give her the time needed to finish a target, reuse spells, or exit a fight that would otherwise be too risky.
How to play it. This synergy requires timing around Diana's entry. Lulu should not spend everything before Diana commits; her value mostly comes when Diana is already in the center of the fight and enemies start focusing her.