i literally get tripple, quadra, and penta kills with this build, esecially utilizing lich bane with lux's passive. not to mention i can 2-3 shot a tank

the first build ,it actually gets over 900, and i have a second rabadons cuz it has the highest ap bonus in the game. the second build DOES have 1200 you just have to max out the effectivness. and ya first build you need elixer of brilliance, and i usually get purple buff too.

but the thing is the first build is soo good ive never lost mid and usually get 25/0/15 that would be my average score

Maybe I'm doing the math wrong but I don't see 1000 AP here. I see 874 and that is if you buy and elixer of brilliance on top of that build. Rabadon's +30% AP passive is unique so it is only applied once.