After tweaking all the criteria one way & the other & introducing one addiitional, I've come up with the following as probably be the closest to the optuim:

Race Distance: 1200m- 3200m
Day of Week: Saturday
Venue: All Metro venues
Horse Win %: 22%-100%
Career Starts: 4-18
TAB Number: 1- 7
Weight to Carry: 54.5kgs-57.0kgs
Last Start Finish Position: 1st-3rd
Won at Distance
Won at Course
Metro run @ Last Start
Max Last Start Beaten Margin: Less than 6 lengths
SP Price: $ 2.0-$21.0

It is worth noting that had the SP price been open, that is no upper limit of $21, the profit as indicated below would have been a lot higher, as the two largest priced winners started @ $46 & $33, which represteted approx 45% of the overall profit. The largest priced winners included in the results is $18.

WIN PLACE
Races Bet: 322 321
Races Won:105 195
S.R./Race: 32.6% 60.7%
Outlay ($): $355.00 $354.00
Return: $467.10 $363.70
$ Profit:$112.10 $9.70
% POT: 31.6% 2.7%

If anyone is interested, I can supply a slightly different criteria with a higher strike-rate, but with reduced profit & turnover.