AP mid's controversy!

*Dilemma

3 dorans - Rabs... or RoA...

Edit : So...from the different point of views we got, it is finally coming to :

1: Do not buy 3 Dorans. It isn't worth it. 1-2 is usually just fine.

2: On some heroes, you should prioritize WotA (Vlad, Kennen, etc.)

3: RoA is good for heroes with sustain damage (Swain, Viktor, Karthus, etc.)

4 : 2 Dorans then Hat seems like the best option for Burst AP's (Brand, Grag, etc.)

Thank you for the great discussion everyone, even if I'm a 1800 AP mid player I often get mixed up with my builds and this is gonna help!