I beleive the question you are asking is: is it a good idea to bet on the tote providing the best odds?
Well of course... Provided they remain that way after close of markets....
How many other people are there doing it? My point is the best odds 1 minute before jump might be then overbacked for that reason, bringing them into the shortest odds.....

There are a number of other options that I would suggest. IAS guarantees to beat at least 2 of the totes, and I believe there is a Maxidiv, that will equal the best tote....
Just doing this you reduce the market from 117% down to 105-110%.

Never settle for what is in front of you. Always chase the best odds, after all you are trying to fill your wallet not fill theirs....