Sorry but this cheesy bronze build doesnt work. You need to do damage and the roa timing doesnt even make sense. Your early game is nothing because of tear. You cant even get the tear early because you want an upgrade for your hexcore. If you cant even clear casters with the laser, then you're going to have a lot of trouble for most of the game.
This means you're augmenting your Q first, and not E. While you have like no ap. You arent clearing any minions for a long time lol.
rabadons will give easily ~100 more ap than roa or ludens after 2 items. This much ap will be similar the added mana shield, and do more damage.
Void staff is also pretty much necessary. You need to do damage lol.b It's just better to position well and do more damage, so that you dont need the shield.