Corastrasza

Corastrasza is found at 29, 25 in Coldarra. She's located on one of the floating rings above the Nexus, so you need a flying mount or someone to summon you up there.

make sure you're flying directly vertically one of the floating platform floors so that if you do make a mistake and are defeated you will parachute down to the platform instead of all the way to the ground below.

Keep your comments on the correct part please, to make it easier for those looking for information.

Regarding Corastraza's location. Here's a map for those wo co-ords. http://www.wowhead.com/?maps=3537:292250

Basically, when you're in Transitus Shield, mount up and head straight from the direction of the flight master. She is on the top 'ring' (the one broken into three pieces, on the most western one).