Jibri - AWS Instance Recommendations?

Does anyone have an instance size recommendation for Jibri? I was running t3.mediums but it seems to be maxing the CPU out on the those which causes some recordings to become unplayable so looking for the cheapest solution for servers that are often idle.

Ubuntu 18.04.5
Kernel: 4.15.0-112-generic
chrome stable version: 86.0.4240.111-1 and tested on 85.0.4183.121-1
jibri version: 8.0-61-g99288dc-1 and tested 8.0-58-g7e3714b-1
ffmpeg version: 7:3.4.8-0