I know people will deny this but...
Can we all just agree at some point that riot has a bias which doesn't favor mages? It might not be against mages, or for a particular archetype, but the result is that mages almost always end up getting constant nerfs where others are getting buffs.
Look just at the 3 big updates. Marksmen, buffed almost every one of them, put more emphesis on the worst possible stat (Crit).
Assassin update, more mobility for most of them, hardly touched their burst damage in most cases, and stealth... stealth fucking everywhere.
As with the mage update... removed spell vamp, nerfed mana pools, and lowered average build AP...
[zombie-brand-facepalm]

too expensive for ya?