Multiplexing SMU 2450

I'm looking into options to multiplex measurements on a SMU 2450. Currently, I am testing electrical breakdown of a dielectric material by applying sustained voltage (30.0 V)  with certain environmental conditions, and monitoring current (~pA), A constant voltage is applied, and then I need to log when current exceeds a certain threshold.

I plan on having ~5-10 DUT, to increase throughput of simultaneous tests. Is there recommended multiplexing solution? I don't think switching speed is a huge concern, because these tests are on the order of several days. Would something like the DAQ6510 with a multiplexing card be a suitable solution?

Some general comments:

For switching pA levels, consider the offset current spec of the switch.

For parallel reliability testing, consider using a power supply to apply voltage bias to N devices.
And then switch in a sensitive amp meter one by one.
When not measuring the current, the switching scheme needs to maintain pathway completion for the current to flow.
Model 3761 switch is one example.