After rereading your tension recommendation you said you go 1 below the MINIMUM. I kept think it was the mid point.
In that case for me I should give 59/55 a try? WOW, the thought of that seems like i'd be putting the ball into the fence every time. However, since I don't know the effect of poly in a hybrid I can only go by recommendations.
I string for myself so costs are manageable. You think 59/55 is a good starting point? Do you find yourself purposely having to apply more topspin to keep the ball in, or will a nice smooth natural swing do?