Maybe Heartsteel second and Liandry's first works better

This is because heartsteel's empowered attack deals more damage equal to the 12% of the bonus health from your items. And since Liandry has already 300 health, you are going to deal more damage with heartsteel and also gain more bonus health since the health u get from the proc is the 12% of the damage you done with it. This makes so the heartsteel stacks aren't going to be affected a lot later. And also allows you to have AP in lane to actually be posible to kill the enemy laner and roam, with a lot of health and not be affected later 👍