Does Riot hate mages or something?
Honestly I would very much like to see a rioter comment on here, to answer this.
Let's name all the AP items that have been getting nerfed:
is losing its offensive passive for a defensive one, why would we need that?
a while back lost like 50 ap and the cooldown was greatly increased
lost 20 ap and 100 health
lost 100 health and 25 ap, and the slow is now like half of what it was
lost all of its ap a while back
Now mages are forced to itemize a specific way:
Burst mages:

Sustain Mages:

Meanwhile, other classes are getting buffs and THEY ARE GETTING AN ANTI-MAGE ITEM THAT REDUCES A SPELLS DAMAGE BY 15%
Riot do you hate mages or...?