Olympia Water is upcoming. I don't know what it is like, but supposedly there's a ton of damage output in all of the Olympia raids. Thanks to Raiko my Thunder is quite fast - and can be faster with Shingen's EI - which means lots of resets for Dian's heal.
There's also Thunder Aphro to consider. She is a really stupendous amount of damage... ... but only if your team is at FULL health. While Marduk's "Barrier" and TAphro Barrier stack, anything that does more damage than that will considerably hurt damage output. Which is why Marduk-TAphro-Dian makes for such a stupendous group, as Marduk's follow-up attacks powered by TAphro does some serious shit. I don't think there is a Miracle Ticket between here and TAphro, so I'm either getting Dian now or assuming that nothing will get through Marduk-TAphro Barriers. And those Barriers don't have 100% uptime either...
But you're right that Azazel is also a hard carry for Wind. Hence, my hesitation.