So im looking to perfect airflow and lower temps in my pc. Ive got a fractalmeshify c case with an 8700k at 4.8ghz and 1.28v with a 1080ti strix so as you can imagine temps are better high when playing at 1440p and 144hz for more demanding titles. Currently I have two front intake 140mm Noctua A14 PWM's, a nh-d15 cpu cooler, and a rear exhaust 120mm Noctua F12 PWM. Would adding a top exhaust help with airflow? If so what would be best, adding the second fan from the nh-d15 to the top( which i believe is a 140mm a15), adding one of the stock 120mm fans, or just buying a new 120mm fan?