Yes, there is a "better" way - move the comment discussion to Chatmove the comment discussion to Chat - this is actually encouraged by the system once the number of comments hits a certain threshold, but any user with 100 rep can create a chat room and invite some users to it.
However you might want to look at supporting this Feature Request:
Edit to respond to comment:
Bear in mind that the question I was answering was "Is there a better way to collaborate with people giving answers which are (initially) incomplete and require further discussion?"
You might not have the whole answer, or feel that someone's done the bulk of the work so rather than create a competing answer you offer some advice to improve/complete the answer and don't want to get into an edit war about it, or have the answer convert to Community Wiki after too many edits.