We have an engagement program consisting of a stream of four Marketo programs. If a lead is a member of two or more, they should be pulled into another stream. What is the best way to create the smart list transition rules to accomodate this? Initially I thought I would just create four "member of program" triggers AND four "member of program" filters. But even if a lead is a member of one program, this would qualify the lead. I could also creat a custom score field to be used for this EP, but there could be a need to do this across several other EPs, requiring the same number of custom fields.