How about making it so that edits within the first ~10 minutes of a question don't count towards the triggers?
The idea of a wiki is to have community-generated content, where many people edit the post to contribute, or update it as needed over a long period of time. In this way all the triggers make sense, except there is no bounding on the time density of the edits.
Improving a question (without the actual content changing) like this isn't quite in the spirit of what a wiki should be, and as you mentioned, going into wiki mode like that really isn't fair to the asker or potential answerers. The wiki-ness of a post should be evaluated after the content is up to community standards, which happens pretty quickly in the case of a new question.
Edit: For those who haven't seen this in action, here is an examplehere is an example I was just involved in.