Ap items

Hello Riot, I like the change to Infinity Edge next patch (cost of 3400 gold from 3600) and I would like to see the same change for ap items because they cost so much and are not very cost effective. Two items that I have in mind are Rabadon (3800 gold) and Luden's Echo (3200 gold). A while back in S5 Luden's ap and dmg was nerfed and then there was a 200 gold increase for no reason. Same for Rabadon but even worse (300 gold increase). My suggestion is to reduce Rabadon's cost to 3600 gold and Luden's cost to 3100 or 3000 gold. That will make them more cost effective and more in line with the price of ad items. That's all I have to say, ciao and ty :)