@Mellx1 

Thank you for your answer. Here are the responses to your three questions. Please check them out:

1. Topology & ER605 Model Choice
The ER605 (V2) is still adequate. Its hardware NAT throughput is rated at 1 Gbps, while each Starlink line typically peaks at 100–250 Mbps. The aggregate bandwidth therefore stays well below the router’s limit, so no immediate hardware upgrade is necessary
2.AOR is essentially policy-based routing. It pins latency-sensitive traffic (gaming, VoIP, banking) to the WAN with the lowest RTT, avoiding Starlink’s occasional 20–40 ms jitter.
Recommendation: Enable AOR and create rules for the relevant destination ports/IPs. Monitor for a week; if all three Starlink links have similar latency, you can disable it again
3.The speed is normal. Starlink’s real-world downlink commonly ranges 70–120 Mbps, and the ER605 reading simply reflects that.
a.Verify the port is negotiating at 1000 Mbps (Status → Port Status).
b.If a PC directly connected to Starlink also tops out at ~84 Mbps, the bottleneck is Starlink itself, not the ER605.