Why'd you do it? (AU)

In another universe where Eren doesn't have the ability to see the future and remain sane, he wields the power of the Attack Titan. But a comrade among his ranks is unfortunate to see what was to become of humanity, a fellow Titan Shifter just like him but they hold the ability to see both the past and future, taking his place instead and planning the Rumbling.

Eren yeager