but I am trying to wrap my head around how to do this at 10Gbps and if its possibly to copy the data from the offsite repos to the cloud repo at the offsite location to eliminate the draw on production to do this and to keep the normal backup cycle running.
Not as if I was pretending to be K.O., but if you want to do that over 10Gb then there should be a 10Gb between the 2nd repo and the Cloud Gateway.
Well, jokes aside, would you clarify the "10Gbit" part of the question, please?
You can setup another backup copy job so that it will use the 1st backup copy job backup chain as a source, and target the 2nd BCJ to the Cloud Repo. Please keep in mind that if an attacker takes over your infrstructure, he can still corrupt your data and run backup jobs several times so the good copies of backups will be overwritten. Please check this thread for some considerations regarding the subject.