WHMCS Automation with several WHM Servers

Hello,

Our business currently has multiple WHMCS installations, for different company trading names / domains.

We are looking to merge everything together into one name, with one domain.

We have several WHM servers, all with standard and reseller users.

I've hit a small issue - before, each WHMCS install was issued a single WHM server for automatic package creation - how can I get WHMCS to alternate between all my WHM servers when provisioning packages now?

We will have identical packages on WHM, and they will all be on the same main domain with seperate IPs and subdomains, the login information is also identical.

Thanks