if 8400

Hi Everyone! I have $350 budget for upgrades on my build... what would you suggest i get. I am a video editor (using premiere and after effects) and currently my build has an i5-8400 stock cooler GTX 1060, 16gb DDR4 2666mhz (I know kinda slow), 500gb ssd, 1tb ssd, 2tb hdd. I have a pretty cheap...