Does anyone know if this boss drops the schematics properly?

video guide: http://youtu.be/RO1Eq5ePQPk

boss has a frontal fire breath and backside tail wipe, so dps & heal stay on his side. he has 3 main machanics: 1) he throws the group back and cc's them. break cc and interrupt him imediatly to stop the huge telegraph from filling the room 2) he casts teles under your feet and snares you, dodge out of those. 3) he choses one player. a huge telegraph appears with a safe zone around that player. cuddle up around him. under the chosen player a smaller telegraph will apear so he has to move. if it's you move slowly in one direction, so that the others can stay in your safe zone. also stay close enough to the boss to let melees hit him. other players best move in fornt of the chosen one.