Did you already look into:
https://help.ubnt.com/hc/en-us/articles/205145990-EdgeMAX-Dual-WAN-Load-Balance-Feature
It might answer most of your questions
Did you already look into:
https://help.ubnt.com/hc/en-us/articles/205145990-EdgeMAX-Dual-WAN-Load-Balance-Feature
It might answer most of your questions