Ryliandry as luxury on Orianna Y/N?
I'd call that more situational than luxury.
Any rate, I'm thinking pairing Rylai's with Liandry's might be overkill. I know where you're going with that, but Liandry's deals double damage regardless of the source of the movement impairing ability. So provided your team has moderate amounts of CC the Rylai's slow might be a waste on Ori because she's all AoE.