I'm putting together a potential DONE4 starting in Joburg in a month or so, and need to start with JNB-SYD. However I'm trying to max out miles within the SWP using only 3 of the 4 allowed segments, but need to leave via SYD (to JFK.)

Am I right that SYD-PER-DRW-SYD is the longest "legal" routing within the SWP given those constraints? If there are longer ones, I'd love to hear of them. Thanks in advance.