Hi Blando,
Have you looked at using the 'repeat row' function and having the row repeat based on resources in a group? It'll let you iterate through a set of commands for every member/row round using a filter or finder. You could hardcode individual cluster/vserver names if you want - in the example below I'm using a user input variable instead.
I mocked up a quick workflow in WFA 3.1 that would iterate through each SnapMirror relationship and attached it to this thread. I didn't have time today to actaully test it out today (the previews all look good), but it looks like it would do the trick on a per-vserver basis. If you wanted to I'm sure you could nest this workflow in a separate workflow that iterates through a list of vservers.
It's worth noting I don't have access to any 8.2.X cDOT clusters right now and primarily use 8.3+; but could spin up some simulators in my home lab if you get stuck with something.
Let me know if you have any questions, happy to help.
