Hey @DOM, and sorry for the delay here. 
I’m curious what challenges you’re running into and what kind of traffic volume you’re seeing, but in general, I would highly recommend checking out the Linkerd Production Runbook from Buoyant, which has a lot of things that’re useful for situations like this. You might also want to check the Linkerd docs about Proxy Concurrency, which includes some specifics about allowing Linkerd to properly take advantage of multiple cores.