botting set up question

[axy123]

Hi guys, I recently bought a botting account with 3 90s spread over 3 WoW licenses but all of them are on the same server. It's a high pop server so there's already quite a lot of competition for nodes. At the moment my bots end up fighting over the same node and it feels unproductive. I've considered using different characters to cover different zones but certain zones are definitely better than others for farming nodes. Do you think its worth server changing one or two of them to farm nodes on other servers or keep them all on the same server covering different zones?
I'd appreciate any input.

Thanks, Axy