I want to trigger a zap when any comment (story) is added to any task within a project in Asana.

I have explored 3 ways of doing this, none which seem to be possible:

1. Use the asana trigger “New Story” → the problem is, this trigger will not allow for triggering on any story on any task in a project. I have to specify a particular task. That won’t work because I don’t know in advance which task in the project will have a comment added.
2. I thought of “polling” all tasks in a project for new comments, using a timer. I set up a “Schedule” trigger, but could not find an action in asana that lists all tasks for a project. A static list would not work because new tasks come and go on this project.
3. I thought of triggering based on “updated task in project in asana”, but this won’t work for two reasons: a) it does not trigger when a new comment is added, and b) There is no asana action for “find stories for task”

I also found this other thread about a seemingly similar thing, but couldn’t figure out what they were actually doing there.

I am at a loss how to proceed.

Deeper explanation

I’m trying to sync comments between Asana  Active Campaign (AC) for a deals pipeline. Active Campaign has triggers for “New Deal Note Added,” so I can get comments from AC to Asana. But I cannot find a way to push new comments from Asana back to AC. 

Thanks in advance for any ideas.