Recommended SCTP stack parameters for high RTT link between sender and receiver

I am using SCTP link between sender and receiver with link's RTT of 500ms. I have used PR-SCTP with limited retransmission policy(0 retransmission). SCTP client sends data to server at 4Mbps data rate.

Specs of my workstation are as follows:
OS - RHEL 8.5
RAM - 32 GB
Processor - Intel Xeon Silver
Compiler - gcc

Please recommend the values of SCTP stack parameters (like receive buffer size, send buffer size, sack timeout, rto etc.) for high RTT link.