lol use game booster, turn off Akamai internet session, turn off aeria ignite once in game put shader 2.0 medium quality 800x600 or more depends on your graphics card and turn everything else to low
I tried playing AVA on my oldest laptop with an Ati HD 2400 with 256 video vram i played with 3.0 shader model and 800x600 and got 90 to 100 fps