You don't want to build a frozen heart on her, that's overkill, but an Gauntlet works well even if the sheen proc is AD. Some items: Rylai's, Abyssal, (Morello or Athens), Liandry's, Death cap, Zhonya (essential I think). Pretty much you forgo a void staff. No tears, RoA, WoA. Lichbane. Haven't played with Deathsfire but with her range it has potential.
She is pretty hefty with that it pool of items.