B2Evolution v 3.3.2

I have a blog that is set up to promote one project. Two contributors are writing to it, and in some cases we each need to send as RSS feed of just our own posts. So – I set up two blogs, one for each contributor. I then set up a blog that aggregates these and made it the default blog for the site. It is also the only blog on the public blog list.

How should the settings for ping-o-matic and pinging B2evolution be set up? Should they be enable on both the individual blogs AND the aggregator? Or only one place or another?

Thanks

Mark