When you are fighting 1 troll, you can easilly kill him TRIANGLE, TRIANGLE. He'll hit you a lot with his club, but you will kill him before he kills you and then you can collect his life. But when you are fighting 2 trolls at a time (Fangorn Forest) you will lose a lot of life and die while killing the second troll. You will notice that some combos will not work on trolls. The troll will block them and grab you. You require an upgrade to level 6 with each character in order to do this. Go and purchase ISILDUR'S DELIVERANCE for Aragorn, BALIN'S DELIVERANCE for Gimli, and ELROND'S DELIVERANCE for Legolas. The combo starts with TRIANGLE. Whenever you hit a troll with the TRIANGLE button he wont block it. You should kill both the trolls with TRIANGLE, X, X, TRIANGLE after purchasing the ISILDUR'S and BALIN'S DELIVERANCE. It is easier and you won't die.