This is my first post ever on a forum!
The easiest way I've found to find set items is to kill the Forest Guardian over and over, AND IT DOESN'T STOP THERE! I am also going to tell you an easy way to get to him.
First you need to get to the Dryad Island. There is a quest giver there just south of the blacksmith where you first come onto the island, slighty east of the savepoint. Do the first quest that she gives you. Then come back and finish the quest. THIS IS THE MOST IMPORTANT PART of this method. Save your game first then when you are ready, talk to her. Right when you accept the quest, she teleports you to a dungeon. DO NOT KILL ANYTHING! Run to the west and down the tunnel and exit the dungeon. WARNING; sometimes when you come out of this tunnel you are surrounded by Fire Flowers. If you are strong you do not have to worry, for others come out swinging just in case or run to the east immediately after the load screen. The Forest Guardian is here just west of where you came out. KILL HIM! if you can. Also after you kill him kill all the monsters in the clearing because sometimes they drop set items also. You should kill them ESPECIALLY if you didn't get anything from the boss. DO NOT GO IN AND FINISH the quest! This is key! Now save your game and exit after you get the loot the monsters drop.
Now all you have to do to get to the Forest Guardian is talk to the Dryad. She will teleport you back into the dungeon and tell you that you still have work to do!! Now just pickup in the guide from the point where she teleported you and repeat as many times as you want!
If you accidentally finish the quest don't panic. You can do this quest once per difficulty and it's always available on Free Mode.
Thank You all and hopefully this helps you!
jvfroman SACRED 2 RULES!!