I wish I could rep you more than +1

Because I can confirm that this worked!
I have enhanced my Minfernal hunt with usage of
keySpam (_keySpam: Timed Keys Sender v1.1). I set it to hit my Interact with target key very very fast, because I felt I couldn't hit the key manually efficiently enough when flying over the spawn point.
In total I did over 25 flights on 3 servers, with both horde and alliance characters, from Hyjal, Astranar and Orgrimmar. Eventually the flight from Orgrimmar worked for me on least populated server of the three I have toons on. While on previous servers, Minfernals were easily targettable but far on the sides of the flight course and I couldn't interact. On the last server though, Shadowsong EU, I targetted Minfernal which was right under myself and fight engaged with no problem. To my surprise, fight took place ... in air!
https://i.imgur.com/mLWouKX.jpg
I was also lucky to get rare quality
