Does Destiny have an official raid alliance with Domus Serpentis?
Nope. Powie and Khirin are simply old friends. And my raidplanner has always been open in the last 3 years.
Is it so important anyway? Tactics aren't secret anymore (at least for the first bosses in T4) and they were 2 out of 24.
After so much time I still find Crom's obsession about guild tags puzzling.