John's advice here is good. The first question you'll want to ask when coming up with the definition is really "Will I need to update individual instances of this record type?" If ...
We recommend that all new development be done in REST. REST is the current focus of API development, and SOAP is unlikely to receive any enhancements moving forward.
Not quite exactly what you're asking for, but you can run a batch with your criteria, then swap your activity filter for the matching trigger and then activate it.
Both of these actually have slightly different behaviors than what is accomplished by what Joe noted. Disabling prefill or per-page/template doesn't prevent the swapping of cookies...