If at anytime during the week you plan on traveling off-peak, you could be better off with an off-peak 10 trip ticket. There is a discount for off peak, but not for peak. If for example, you travel 4 days off peak and 1 day peak, you would just pay a step up fare on the train for the one peak travel day. The step up fare just brings you pake to paying the peak rate for the one day. Weekly might be better for you though depending on the dates you want to travel. You should compare the 10 day option to the weekly option to see which is a better deal for your particular circumstances.
They kinda balance out.... check online for prices and deals or the LIRR app gives you prices for peak and non peak
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