In summary, if we stick to backing class horses ridden by class, in-form jockeys then we should look forward to a profitable spring.
There is an old system which selects horses in the 1/1 - 7/2 range, ridden by one of the top three jockeys(or if you like, the top 3 strike-rate riders). If more than one runner qualifies, then back each or eliminate any that you choose to. This used to work extraordinarily well years ago but I haven't checked it for some time. It is a system directed specifically for featuire races and carnival time but it should also work very well on the very strong Victorian Spring Provincial carnival circuit(Bendigo, Werribee etc).
Maybe one of the forum's stats experts may be able to monitor this method.

Cheers.