AP and Objectives

For the longest time I have ignored how poorly mages are at getting down objectives. But the more I think of it, it seems unnecessary (and is costing me losses). AP already need some type of protection in team fights, and most are also pretty squishy and use skill shots..... in other words they are a fun balanced part of the game. But being so reliant on others (AD) to help get objectives down, seems unbalanced. Late game it is like night and day, when it comes to winning and losing. I am not saying AP should be as good as AD at killing turrets, but it should be better in my opinion. Having an AP fed is far far less important than an AD late game.

Maybe "Arcane Blade" mastery can be buffed to add more AP to attacking objectives (not champs) like 15% or 20%. That seems like a lot but ranged mages mostly aren't building attack speed and at 500, 15% is only an unbuffed 75.