Well the first one i got was from death claw promontory and then what i did next is the tricky part. I started For auld lang syne, I talked Moreno into comming and then all i got my armor from dasiy. I sneak killed Moreno and took his armor and left in the door to complete the quest so fast that it would't fail the quest by killing him, so i got dasiys and Moreno armor, then arcade came and gave me the gannon armor. Any one else try this or just me?

But you can still only wear one...