Originally Posted by Jenkin Rei
Ryze, Singed, Morgana, sometimes Blitz. RoA has more HP with it as well, and gives you back hp and mana regen per level up. So this is actually very good for staying in lane. After lvl 18, It isn't much better than Rylai's so you could trade it in if you have the gold.
I'm going to add Anivia to that list, because Anivia is so mana-hungry that you could benefit from both RoA *and* Grail, and Anivia's passive effectively doubles the HP bonus. Too good on Anivia.
That said, what AP Mids do you play? For quite a lot of them, you do want to just rush Deathcap, and after Deathcap it's kinda pointless to build RoA.