Hey,
This is actually a perfect candidate for the Data Streams feature that was introduced in TestStand 2017. If you haven't upgraded to the TestStand 2017 SP1, you can download it at TestStand 2017 SP1 - 64 bit and take a look at the shipping example for data streams at <TestStand Public>\
Examples\Fundamentals\Using Data Streams\
Thanks!
Roxy