You have too many transcons in NA on your itin. Here's the best SC-earning routing I've been able to find:

syd-jfk 220
jfk-dfw 60 (First)
dfw-sfo 60 (F)
sfo-bos 150 (F)
bos-dfw 60 (F)
dfw-anc 150 (F)
anc-dfw 150
dfw-zrh 160
zrh-hel 60
hel-lhr 60
lhr-ath 60
ath-lhr 60
lhr-nrt 160
nrt-hkg 60
hkg-nrt 60
nrt-mel 160
mel-bme 60
bme-mel 60
mel-per 60
per-syd 60