Thanks Castile!
So after I fished up the sea turtle I couldn't resist to get the Archaeology mount as well, not the raptor one since I had that quite early from leveling Archeology but the Qiraji Battle tank. Doing my research here & there I found out that there was a bug with constantly getting Tol'vir digsites if you had a mantid item in your bags, unfortantly for me that was solved during patch 5.4 so I wasn't going to work for me - I had to do it the hard way.
Instead of moaning I thought of a better way to get it, during the past few weeks I had been quite busy with farming achievement points as well (currently at 17000 points). So I thought I'm just gonna try to get all the achievements of Archeology in Pandaria and might even head for the <Seeker of Knowledge> Title. The restored artifacts I made can be traded for Tol'vir Artifacts and although it's a bit slower then farming digsites at Kalimdor, I would see where I ended up after doing all of the achievements. Almost two weeks passed while during Archeology when I finally hitted the thing I was hunting for - The Ultramarine Qiraji Battle Tank!
With all the time spended on this mount, this is definitely one of my favorite mounts ingame at the moment. On top of that I was also able to get the <Seeker of Knowledge> Title & all Archaeology achievements as well!