If ahead of time you know you'll need the Smart List criteria for multiple campaigns, you can at least in this case create a separate Smart List with all the criteria and then say ...
As already mentioned by others, support is the only way to merge fields currently. It's a pretty quick turnaround though. They'll just want youto verify the mapping and which field...
If you need more information, you can always email the certification team as well: marketo-certification@marketo.com.Here's the preparation guide I was given: http://pages2.marketo...