Difficult one this but, as played, pretty much dont enter out of my depth in these larger buy in comps imo
Chumpy, you tried to play poker ...... bloody heretic!
Why not heed the great advice from all these subtle players, jam pre (close eyes, and pray) and then see if it's your turn for your number to pop up into the Bingo Caller's hand!
Simples.
lol you can "try" and "play" as much poker as you want there is no way anything other than shoving pre is the most optimal line here
and if there was a way to play it more profitable checking pre....check, check/fold post flop probably wasn't it either.