Race card farms are getting more and more popular. The new wiki we are working on has a page devoted to this. You can find it here:
http://elementswiki.co.cc/pve/rare-card-farm/Best part is that
anyone can edit that page.
Here's what you do:
1. Go to:
http://elementswiki.co.cc/wp-admin/post.php?action=edit&post=614 (you might have to register or login at this point)
2. You see a list of "Rare Card Farms currently in top-50". Edit the list. If you know what particular cards are in that rare farm, include those as well.
3. Click "update" (at the moment we have a revision system that doesn't show your edits unless and Editor approves them. I'm trying to find a workaround to this so that the process is faster.)
