When I was betting regularly, I bet $36 per game, all trifectas.
I would pick my best team and I had 6 trifecta combinations for
each post position, using that number in the win and place position.
I did not vary that amount from game to game.
Betting big to win big (or recoup losses) is a losing strategy
in practice. Also, betting small in games where you can't make
up your mind is also poor. In those cases it is better not to
bet at all.
I don't bet jai alai any more, having moved on to the stock market,
where I find the same strategy optimizes results. Every time I
fall in love with a stock and invest heavily, I end up regretting
it. Conversely, when a stock meets my criteria but I invest timidly,
I also regret it.
I learned this from my boss and mentor of many years. Although
very wealthy, he always bet the same amount, whether it was football,
poker, or craps.
Have a methodology and follow it consistently. That is the best
approach to investing as well as gambling. Trust me, I have been
doing it for nearly half a century.