I prefer to keep away from that sort of thing Lomaca.

The weirdest I have gone is an inversion table.
Supposed to be good for the spinal column.

Lomaca.
I don't understand your betting.
Your best bet is at what I would think are quite good Odds, based on My Market anyway.
And what happens if it wins and your other runners don't figure.
You end up square.
Wouldn't you be better off placing the $15 straight out instead of Exotics.
Even if it starts @ $6 , that would be a collect of nearly a hundred bucks.

I suppose a hundred bucks to you means like maybe $10 to me , so then I sort of understand.

I still reckon you have found a very difficult race to pin down to just the 2 permutations.
I won't be playing , but if I were , I know I'ld be going lots of combinations for a small percentage in Flexis.

EDIT:
Lomaca
Waste $2 on a Trifecta
7 - 3,5 - 3,5 for a Unit.