Honestly, in messing around, I find a good core to just be frozen + atmas. We are honestly talking about a Combo champion who's biggest strength is to go in and beat a good 20% hole into someone's face, and not really an on hit champ. I'd consider items that gave tankiness, or increasing your combo ability with cdr.
Items more like Zephyr, Last whisper due to denting blows letting you be able to even cause some damage to tanks, the maw or the scimitar, Cleaver obviously, but i'd pass on almost all sheen-based items, due to her kit relying on just getting those 3 hits asap. Zeke's herald would be a good aura to carry. Zeal to a late game phantom dancer can be useful, just for the aspd+movement.
Defensivewise, the best sheen item is the frozen gauntlets, giving tankiness and disruption with the aoe slow. I already brought up Atmas, and tossing a warmog never hurt. That and there's really not that many top end ability on hit items that exist nowadays for a bruiser champ.