The Druidic Helmet is found behind a barred door in the main church building at Movilla Abbey. You’ll need to head round the side of the abbey and shoot the door lock through a barred window and then you’ll be able to return inside and grab the armor from a chest.
This armor is found in the military camp at Aileach. You’ll need to head into one of the red tents and shoot down at the door lock through the grate floor. Then, head down the slope nearby to reach the underground area where you’ll be able to now access the small store room where the helmet is found.
The Druidic Bracers are found inside a building at Donegal. You’ll need to climb up the side of the wall to reach an open window where you’ll then be able to head inside and grab the armor from the chest.
This armor piece is found in Inch Lough Neagh in Ulster. You’ll find the armor in a chest in a red tent, and you’ll likely have to fight your way to it.
The Druidic Cloak is found in Doon Fort druid camp, which is located on a small island in the northwestern region of Ulster. You can sneak in and grab the armor from the chest or you can fight your way through.