Minikit #6: On the same ledge as the last explorer skeleton you’ll find a set of Mithril bars. Destroy them with the Berserker’s bombs, and use Frodo’s Glowing Vial to enter the opened cave and find a minikit.
Minikit #7: When you reach the beach, there will be three bottles floating just off of the shore. Break up some boulders and throw the resulting rocks at the three bottles for a minikit.
Minikit #8: To the west is a Morgul gate. Break it with Aragorn’s sword to free a horse. Mount the horse to reveal a trail of studs. Follow them to find a minikit.
Minikit #9: While ascending the ledges on the west side of the area, you’ll come across a dark cave. Use Frodo’s Glowing Phial to enter a new zone.
In the center of the area is a frozen lake. Destroy the ice crystal to reveal a cracked tile. Shatter it with Gimli’s axe to uncover a fishing spot. Then hop onto the jetty and use Gollum’s fishing ability to catch a fish.
Stick with Gollum and climb the nearby wall to the upper platform. Light the bonfire with Sam’s tinderbox to defrost the cave troll, and feed him the fish you caught to receive a minikit.
Minikit #10: During the fight with the Watcher in the Water, use Sam’s rope to ascend to this ledge. Bust through the grass atop it to find another minikit.