I got myself a ninja greegree today. Just kill one of those level 86 monkeys, pick up their bones and buy a talisman from the magic shop. Then go to the Gnome mage at the end of Marim dungeon and use the two items on him. Remember to use, not bury the bones!! He will give you a ninja monkey greegree. When holding this you can enter the agility course. I've been doing it today and at level 51 agility I fail the obstacles a lot! You can big net fish or harpoon for sharks there and there's a tree on top of the hill. However, there are also some poisonous scorpions there, which are always agressive! So try to fish when they're not there, because you can't fish as a monkey. :( You could try to advance in the Monkey Madness mini quest of Recipe for disaster and get the nuts, which are down a hole on top of the hill, between the rope swing and zip line. Good luck