Hello Sarcoth,
I was able to send the Idara's Visage and the Eila's Visage back to their original owners and left the Jeric's Visage in your main inventory. The guild hall trophies will not function if they are all placed by the same player so you will need to have 2 other players place their trophies into the guild hall. I left your Jeric's Visage in your main inventory where you will be able to place it and provide your guild with the buff. Also, the Head of Kotasoth can be placed by the same player who placed one of the claimed guild trophies. I hope this helps! Please feel free to contact us regarding any future issues you may encounter.
Have a great day and good luck in Telon!
GM Durros