Tracking Touches for SDR Team

counting activities on the contact or lead record in SFDC isn't (to my knowledge) easy without using APEX/triggers.  We're experimenting with using a score field in Marketo that is triggered to increment  by 1 for every activity that contains "call" in the subject that is created while a lead is in MQL, with it resetting to 0 when the lead leaves MQL.  Might use it to count activities in "current status", so it would reset to 0 every time the status changed.  I'm also thinking about creating a second counter for email.  using a score field seemed the best way to go as it can be incremented.  The score field is created as a number field SFDC side first, then changed to a score field in MKTO when the field syncs over.  It would be useful if other fields from the activity were visible as a constraint on the activity is logged/updated trigger, but they don't seem to be in my instance.  Then you could use a picklist instead of relying on a naming convention.  Finally, longer term plan is to do this SFDC side anyway, since we want to accurately track the time an activity was performed (eg response time to web requests) against SLAs, but for now we're starting with the MKTO route as its easier to get something working before finding resource to help with the APEX.