it's already been demonstrated that excellant throws usually miss out on curve ball bonus for a multiplier of 2
were a great throw from 9-6 oclock for a clockwise throw will more reliably get curve ball for on average 2.5 multiplier.
but other than that raikous catch rate dose suck with a fairly neutral delivery of golden raz (mostly only used on 1890cp+) my catch rate is about 1:3.