And/or we/me can manualy checka all the quests that you get from searching on google for:
"kill" "?quest" site:www.wowhead.com
"slain" "?quest" site:www.wowhead.com

Yay! each search gives about 800 results with removal of similar pages.
Realy it would not take that much time just manualy (will ofc be best) or using a simple macro.

A macro might be something like checking the cached pages and searching for the yellow colour in "slain" only in the area where it is suppose to be, and if true copies it into http://www.thebrokentheused.net/kill/add.html

A very simple solution but might be the quickest.

I'm currently setting up everything for 5mixed boxing, if someone wants to do it go ahead ofc , anyways if no one els will I will try to do it asap.