Percivil:

Take advantage when fighting with Percivil at your side. If he is close enough he will heal you when ever you take damage, that way you do not have to worry about blocking.

Play as red green and black knight:

To play as the red, green or black knight on the last mission go to morgans castle take out the ghosts and golems and take the itemsand go in to the room thats not blocked and talk to morgan and go back to base now leave your partners at the healing stone and go west until you geta white platform press L3(analog stick on left side)and go back to find the red,green, and black knight.