i need help to re learn jhin builds again.

before the crit rework i can hit 100% crit with 2 items only rapid fire cannon and infinity edge after that full build with gathering storm allows me to hit 1000 ad but now i feel like the numbers dont add up when i do my MOST AD POSSIBLE WITH 100% crit build. it ends up at 400 or 600 (i forgot which) mid/lateish game at full build. dang i was expecting a change but not a nerf.