"Right, because staying in his ocular range will probably keep him fixed in one direction! Good idea!"

And Luz gave one glance at Isabela putting her idea to the test before making sure she continued her own plan.

So long as the heartless could see Isabela in front of it, that's what it would concentrate on. It wouldn't notice that Luz had iced the floor until it was too late and it was falling over, now taking some of Isabela's hits instead of being able to parry them.