hedgehog
Dam
I've been thinking that from your hint sp ranking or something like it should be combined with lto placing. That can be quite time consuming, as I know from experience, to work out the ranking for SPs other than favourite. I think a quicker approach might be to add together the SPs of the 1st and 2nd then divide by number of runners in the race then add this to the sum of 1st and 2nd lto placing. This would give a very quick rating and weight towards lower SPs with good lto placings.
Do you think this might work?
Good luck today